BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:STUDY OF RADIONUCLIDE YIELD IN PHOTONUCLEAR REACTIONS ON NATURAL IRON DTSTART;VALUE=DATE-TIME:20220713T145000Z DTEND;VALUE=DATE-TIME:20220713T150500Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-381@events.sinp.msu.ru DESCRIPTION:Speakers: Denis Iusiuk ()\nThe study of the atomic nuclei phot odisintegration is one of the important tasks of fundamental nuclear physi cs\, since a quantitative comparison of such important branches of giant r esonance decay as (γ\, n) and (γ\, p) channels has not yet been carried out. This is due to the limited measurements of photoproton cross sections . Data of the radionuclide yields on iron atoms are also important for the development of photoactivation analysis of various origin structural mate rials.\nWe have studied the weighted average yield of the (γ\, p) reactio n for 57Fe upon irradiation of natural composition iron targets. The targe ts were irradiated with 20 MeV bremsstrahlung quanta. Irradiated targets w ere measured by an Ortec semiconductor spectrometer with a high purity ger manium detector. The 847 keV γ-line from the 56Mn decay was reliably dist inguished in the spectra\, as well as by the half-life measurement method. As a result\, the weighted average output Y(γ\, p)=5.1±0.6 mbn was obta ined. However\, calculations of this output using the Talys 1.96 code resu lts YT=1.1 mbn. This value indicates a large role of non-statistical proce sses. We also considered the mechanism of semidirect reactions\, taking in to account the isospin splitting of the resonance\, and we obtained the va lue YI=1.5 mbn. The received results are discussed.\nThis work is supporte d by the Russian Science Foundation under grant 22-29-01013.\n\nhttps://ev ents.sinp.msu.ru/event/8/contributions/381/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/381/ END:VEVENT BEGIN:VEVENT SUMMARY:STUDY OF (γ\, p)-REACTIONS ON NICKEL ISOTOPES DTSTART;VALUE=DATE-TIME:20220713T150500Z DTEND;VALUE=DATE-TIME:20220713T152000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-542@events.sinp.msu.ru DESCRIPTION:Speakers: Yury Balaba ()\nThe study of photonuclear reactions on nickel isotopes is of great fundamental and applied importance. The stu dy of (γ\, n)- and (γ\, p)-reactions on nickel isotopes makes it possibl e to study the nature of direct\, semi-direct\, and statistical processes in such nuclei region.\nWe have carried out activation studies of weighted average yields of (γ\, p)-reactions for 58\,62Ni with the 20 MeV bremsst rahlung beam on natural nickel targets.\nThe spectra of irradiated targets were measured using a Canberra semiconductor spectrometer with an energy resolution of 0.75 keV at the 122 keV gamma line and 1.7 keV at the 1378 k eV gamma line.\nThe 57\,61Co activities were reliably identified in the st udied spectra. Moreover\, the 61Co activity was reliably detected using th e 909 keV gamma line\, which made it possible to minimize the error in mea suring the gamma spectra of “thick” targets. As a result\, the followi ng values of the weighted average yields of (γ\, p)-reactions were obtain ed: for 57Co Y=15.1±0.7 mb\, for 61Co Y=1.61±0.16 mb.\nBased on the simu lation results within the TALYS 1.96 program code\, the following values w ere obtained: for 57Co Y=6.5 mb\, for 61Co Y=0.44 mb. The obtained results are discussed.\nThis work is supported by the Russian Science Foundation under grant 22-29-01013.\n\nhttps://events.sinp.msu.ru/event/8/contributio ns/542/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/542/ END:VEVENT BEGIN:VEVENT SUMMARY:THE METHOD AND SET UP FOR THE MEASUREMENT OF DELAYED NEUTRON TEMPO RAL CHARACTERISTICS FOR THE FISSION OF HEAVY NUCLEI IN THE COMPLEX PRIMARY NEUTRON FIELDS DTSTART;VALUE=DATE-TIME:20220712T131000Z DTEND;VALUE=DATE-TIME:20220712T133000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-204@events.sinp.msu.ru DESCRIPTION:Speakers: Dmitrii Gremyachkin (JSC SSC RF-IPPE)\nPresent work is dedicated to the description of the set-up designed for precise measure ments of the energy dependence of aggregate delayed neutron characteristic s in the energy range of primary neutrons from thermal to 20 MeV. The set- up constructed on the base of Tandem-3M accelerator of SSC RF – IPPE con sisted of high-efficiency neutron detector\, spectrometer of primary neutr ons\, pneumatic transport system of the sample under investigation\, exper imental control and data acquisition system. Special emphasis is made to s tudy the influence of the primary neutron flux on performance characterist ics of the neutron detector and to the measurements of the primary neutron spectra generated from the reaction D(d\,n) on the solid neutron target. The results of measurements of delayed neutron relative abundances and hal f-lives are presented for the fission of 235U by the neutrons in energy ra nge from 0.42 to 8 MeV\, including insufficiently known range from 4 to 8 MeV.\n\nhttps://events.sinp.msu.ru/event/8/contributions/204/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/204/ END:VEVENT BEGIN:VEVENT SUMMARY:Charge exchange processes in carbon ions fragmentation at 300 MeV/ nucleon: a comparison with models of ion-ion interactions DTSTART;VALUE=DATE-TIME:20220714T150900Z DTEND;VALUE=DATE-TIME:20220714T152900Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-210@events.sinp.msu.ru DESCRIPTION:Speakers: A. A. Kulikovskaya (NRC «Kurchatov institute»)\nTh e study of ion-ion interactions at high energies is one of the main direct ions of modern nuclear physics. A significant number of Monte Carlo models have been developed in this direction\, that require both experimental ve rification and improvement of their basic approaches. Also\, the processes of nucleon charge exchange in ion fragmentation are poorly studied. There are only a few experiments performed in energy range 1-2 GeV/nucleon and only for isobaric transitions [1\,2].\n The experimental data were obtaine d at the FRAGM facility of the ITEP−TWAC heavy-ion complex for 12С frag mentation at 300 MeV/nucleon on a beryllium target [3\, 4]. Fragments were detected at an angle equal to 3.5◦ with respect to the incident ion bea m. The fragmentation of carbon ions leads to the production of three long- lived isotopes as a result of single nucleon charge exchange: 11Be (7 neut rons)\, 12B (7 neutrons)\, 12N (7 protons). Isotopes 11Be and 12B were fou nd and their momentum spectra were measured. The predictions of four Monte Carlo models of ion-ion interactions (BC\, INCL\, LAQGSM\, and QMD) were tested if they can describe the experimental momentum spectra of the fragm ents. The binary cascade (BC) model gives the best description.\n\n\n1. М .Roy-Stephan et al.\, Nucl.Phys. A482\, 373 (1988).\n2. J. L. Rodriguez-Sa nchez et al.\, Phys.Lett.B 807\, 135565 (2020).\n3. B.M. Abramov et al.\, EPJ Web Conf. 138\, 03002 (2017).\n4. B.M. Abramov et al.\, J.Phys.Conf.Se r. 1390\, 012004 (2019).\n\nhttps://events.sinp.msu.ru/event/8/contributio ns/210/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/210/ END:VEVENT BEGIN:VEVENT SUMMARY:FRAGMENTATION OF NUCLEI UNDER RADIATION ACTION OF VARIOUS TYPE DTSTART;VALUE=DATE-TIME:20220714T142900Z DTEND;VALUE=DATE-TIME:20220714T144900Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-232@events.sinp.msu.ru DESCRIPTION:Speakers: Nikolay Novikov (Skobeltsyn Institute of Nuclear Phy sics Moscow State University\, Moscow\, Russia)\nFRAGMENTATION OF NUCLEI \nUNDER RADIATION ACTION OF VARIOUS TYPE\n\nN.V. Novikov\, N. G.Chechenin\ , A. A.Shirokova \nSkobeltsyn Institute of Nuclear Physics Moscow State Un iversity\, Moscow\, Russia\nE-mail: nvnovikov65@mail.ru\n\nThe study of th e mechanisms of formation and decay of an excited nucleus is important fo r describing the characteristics of fragments of a nuclear reaction [1]. T he applied significance of this problem lies in the use of various types o f radiation in experiments to determine the radiation effects in the elect ronics. The single event effects on onboard electronics can occur not only from direct medium ionization by primary ions\, but also from the effect of charged fragments of the nuclear reactions on the sensitive volumes of electronic circuit assemblies [2].\nWe study the influence of the primary particle of ionizing radiation on the mechanism of relaxation of the excit ed nucleus\, as well as on the distribution of heavy secondary ions with t he nuclear charge Z>2 during the passage of protons\, gamma rays and relat ivistic electrons through silicon. The interaction cross section and secon dary ion energy distribution at the moment of decay of an excited nucleus were calculated using the GEANT4 [3] and TALYS [4] programs. A new analyti cal approximation for secondary heavy ion distribution in terms of linear energy transfer is proposed.\n\n1. N.V. Novikov\, N.G. Chechenin\, N.V. Ch uvilskaya et al. Physics of Atomic Nuclei. 84\, 315 (2021).\n2. N.V. Novik ov\, N.G. Chechenin\, and А.А. Shirokova J. Surface Investigation. № 2 \, 236 (2021).\n3. J. Allison\, K. Amako\, J. Apostolakis et al. NIM A.835 \, 186 (2016).\n4. A. J. Koning\, and D. Rochman. Nucl. Data Sheets. 113\, 2841 (2021).\n\nhttps://events.sinp.msu.ru/event/8/contributions/232/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/232/ END:VEVENT BEGIN:VEVENT SUMMARY:OPTICAL MODEL ANALYSIS OF PROTON ELASTIC SCATTERING ON 6Li NUCLEI WITH RESONANCE CONTRIBUTION DTSTART;VALUE=DATE-TIME:20220712T141000Z DTEND;VALUE=DATE-TIME:20220712T143000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-588@events.sinp.msu.ru DESCRIPTION:Speakers: S. M. Selyankina (Russian Federal Nuclear Center – All-Russian Research Institute of Experimental Physics)\, S. M. Selyankin a (Russian Federal Nuclear Center – All-Russian Research Institute of Ex perimental Physics)\nOptical model analysis [1] of proton elastic scatteri ng on 6Li nuclei at proton energy from 50 keV to 185 MeV was continued wit h the use of the optical-model program code OptModel [2] taking into accou nt the resonance contribution. Polarization data [3] in 1.21 to 3.22 MeV p roton energy Ep range were added into set of the early used elastic scatte ring experimental data.\n1. L.N. Generalov\, V.A. Zherebtsov\, S.M. Selyan kina\, Bull. Russ. Acad. Sci. Phys. 85. 1136 (2021).\n2. L.N. Generalov\, V.A. Zherebtsov\, S.M. Taova\, Bull. Russ. Acad. Sci. Phys. 80. 295 (2016) .\n3. C. Petitjean\, L. Brown\, R.C. Seyler\, Nucl. Phys. A. 129. 209 (196 9).\n\nhttps://events.sinp.msu.ru/event/8/contributions/588/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/588/ END:VEVENT BEGIN:VEVENT SUMMARY:STUDY OF THE MECHANISMS OF HADRON-NUCLEAR INTERACTIONS ON THE POS ITIVE BEAM LINE 18 OF U-70 ACCELERATOR (Experiment proposal) DTSTART;VALUE=DATE-TIME:20220715T091000Z DTEND;VALUE=DATE-TIME:20220715T093000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-264@events.sinp.msu.ru DESCRIPTION:Speakers: Serguei Sadovsky (NRC "Kurchatov institute" - IHEP)\ nThe aim of the project is to study the mechanisms of hadron-nuclear inter actions at the Hyperon experimental setup located on beam line 18 of the U -70 accelerator complex\, Protvino. It is proposed to upgrade the setup so that to be able to study additionally the excited states of secondary nuc lei by means of precision nuclear gamma-ray spectroscopy in dependence on the specific type of interaction of hadrons with target nuclei. Of particu lar interest is the newly discovered d*(2370) dibarionic state formed both in vacuum and in the composition of light nuclei\, where it can presumabl y replace deuteron clusters. Precision gamma-ray spectroscopy makes it pos sible to differentiate these cases. Further detailed study of these phenom ena is necessary. It opens up a new direction in nuclear physics at the ju nction with the particle physics of intermediate energies. \nThe project w ill be carried out on the basis of the existing Hyperon-M experimental set up of NRC “Kurchatov Institute” - IHEP. The main detector of the setup is the cherenkov lead glass photon spectrometer LGD2 used for detection o f energetic photons in the forward hemisphere of reaction π+A ➞ M0➞k γ A’. To fulfill the tasks of the new project\, it is proposed to upgra de the setup with the Charged Particle Veto (CPV) and Gamma Nuclear Transi tion (GNT) detectors. The CPV detector is a system of segmented scintillat ion counters dedicated for detection of the secondary charged particles in a solid angle close to 4π. For detection of the scintillation light the SiPM type photodetector will be used. The GNT detector is dedicated for pr ecision measurement of photon energies in nuclear gamma-transitions of sec ondary nuclei formed as a result of the interaction of beam particles with target nuclei. The energy spectrum of these photons lies in the range fro m 0.25 to 80 MeV.\nAfter the gradual modernization of the setup to the Hyp eron+ level\, it is planned to expose the setup on the positive beam line with the momentum of 7 GeV/c for several nuclear targets (Li\, Be\, B\, C\ , O) and obtain experimental data for a detailed analysis of 2π0 systems formed\, among other things\, as a result of the decay of d*(2370) ->d+2π 0 both in vacuum and inside the target nucleus.\n\nhttps://events.sinp.msu .ru/event/8/contributions/264/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/264/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the 16O(alpha\, alpha)16O(3–) and 15N(alpha\, t)16O(3 –) reactions mechanism at E_alpha = 30.3 MeV DTSTART;VALUE=DATE-TIME:20220712T120000Z DTEND;VALUE=DATE-TIME:20220712T123000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-589@events.sinp.msu.ru DESCRIPTION:Speakers: Natali Zelenskaya (Lomonosov Moscow State University \, Scobeltsyn Institute of Nuclear Physics)\nThe study of the differential cross sections angular dependence of the reactions 16O(alpha\, alpha) [ 1 ] and 15N(alpha\, t)16O(3–) [2] at E_alpha = 30.3 MeV was carried out. Both magnitude and shape of the measured cross sections and large value of E3 transition between the ground and 3– level of 16O nucleus justify th e use of CCBA formalism\, when both couple channels method (CC) and DWBA a re combined (FRESCO [3]) as well as the compound nucleus (CN) mechanism (T ALYS [4]) in the theoretical analysis. The strength of coupling factors we re introduced from the experimental reduced transition probability B(E3). The exchange of 12С cluster with summation over all states allowed by the selection rules for transfer mechanism at both reactions and proton strip ping for the (alpha\, t)-reaction were taking into account. The spectrosco pic amplitudes are obtained in the shell model. The calculated angular dis tributions\, together with the experimental ones\, are shown in figs. It c an be seen that in (alpha\, alpha')-scattering\, the cross section is dete rmined by collective excitation in the front hemisphere and by 12С exchan ge at large angles. The СN contribution is not noticeable. In the reactio n (alpha\, t)\, the main contribution is made by the CN mechanism\, else t he contribution of the proton stripping is noticeable at forward hemispher e. The 12C exchange mechanism is important at theta_t > 90\\circ. The perf ormed analysis showed that the calculated cross sections of both reactions agree with the experimental one without introducing normalization factors only when all considered mechanisms are taken into account.\n\n![Cross se ctions of (alpha\, apha') (a) and (alpha\, t) (b) reactions: thin solid li ne – CC (stripping)\, dotted – exchange of 12С \, dot-dash – CN\, f at solid – sum\, black dots – experiment][1]\n\n1. A.V. Ignatenko\, V. M. Lebedev\, N. V. Orlova et al.\, Phys. Atom. Nucl. 59\, 565 (1996).\n2. A.V. Ignatenko\, V. M. Lebedev\, N. V. Orlova et al.\, Phys. Atom. Nucl. 61\, 1 (1998).\n3. J. Thompson\, Comp. Phys. Rep. 7\, 167 (1988)\; http:// www.fresco.org.uk.\n4. J. Koning\, S. Hilaire\, and M. C. Duijvestijn\, T ALYS: AIP Conf. Proc. 769\, 1154 (2005).\n \n\n\n \n\n\n [1]: https://dis k.yandex.ru/i/ZGo5QxpSOvjtmw\n\nhttps://events.sinp.msu.ru/event/8/contrib utions/589/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/589/ END:VEVENT BEGIN:VEVENT SUMMARY:ASYMPTOTIC NORMALIZATION COEFFICIENTS AND THE NEUTRON WIDTHS FOR $ ^{30}$Si+n $\\to ^{31}$Si FROM THE PERIPHERAL $^{30}$Si($d\,p$)$^{31}$Si R EACTION DTSTART;VALUE=DATE-TIME:20220712T093000Z DTEND;VALUE=DATE-TIME:20220712T095000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-310@events.sinp.msu.ru DESCRIPTION:Speakers: Erkinjon Ikromkhonov (Institute of Nuclear Physics\, Academy of Sciences of Uzbekistan)\nUsually the differential cross sectio ns (DCSs) of nucleon transfer reactions (NTR) are analyzed within the conv entional DWBA for determination of a nucleonic spectroscopic factor S (SF) by normalization of the calculated DCS to the experimental data ([1] and references therein). The SF have strong dependence on the single-particle potential parameters. In contrast of the SF\, the values of the asymptotic normalization coefficients (ANCs) [2] found from the analysis of the peri pheral NTR are fairly weakly dependent on the single-particle potential pa rameters. The modified DWBA [3] and the dispersion peripheral pole model ( DPPM) [4] can be used for determination of the ANCs from the analysis of t he DCSs of the peripheral NTR. In both of these methods\, the DCS is expre ssed in terms of the ANC for the removed nucleon from the residual nuclei. Nevertheless\, the modified DWBA [3] can be applied when the residual nuc leus in the reaction under consideration is formed only in bound (nonreson ance) states\, whereas the DPPM allows analyzing the DCS of the peripheral NTR populating to both bound and unbound states of the residual nucleus.\ n In the present work\, the results of the analysis of the experimental DC Ss for the $^{30}$Si($d\,p$)$^{31}$Si reaction populating to the bound and unbound (resonance) states of the residual nuclei measured at the project ile deuteron energy 12.3 MeV [5] are presented. The analysis were perform ed within the framework of the DPPM [4] and MDWBA [3] with correct taking into account the three-body Coulomb dynamics in the transfer pole mechanis m and Coulomb-nuclear distorted effects in the exit and entrance channels [6]. \n The analysis shows that the DCSs calculated within MDWBA [3] and D PPM [4] are in a good agreement with the experimental data. The new values of the ANC for $^{30}$Si+n $\\to ^{31}$Si with their uncertainties corres ponding to the bound states of the $^{31}$Si nuclei are obtained from the analysis of the experimental DCSs of the reaction $^{30}$Si($d\,p$)$^{31}$ Si within DPPM [4] and MDWBA [3]. The neutron widths for the resonance sta tes of the 31Si nuclei are obtained from the analysis of the experimental DCSs of the reaction $^{30}$Si($d\,p$)$^{31}$Si within DPPM [4].\n\nREFERE NCES\n1. S.A.Goncharov et al.\, Yad.Fiz. 35(1982) 662\n2. L.D.Blokhintsev et al.\, Sov. J. Part. Nucl.8(1977) 485\n3. A.M.Mukhamedzhanov et al.\, Ph ys.Rev.C56(1997) 1302\n4. E.I.Dolinskii\, P.O.Dzahamalov\, A.M.Mukhamedzha nov.\, Nucl.Phys.A202 (1973) 97.\n5. S.Piskor\, J. Novak et al.\, Nucl. Ph ys A 662 (2000) 112-124\n6. G.V.Avakov et al.\, Sov. J.Nucl.Phys.43(1986)5 24\n\nhttps://events.sinp.msu.ru/event/8/contributions/310/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/310/ END:VEVENT BEGIN:VEVENT SUMMARY:RELATIVE PROBABILITY OF HIGH-SPIN ISOMERIC STATES POPULATION IN ( α\,n)-REACTIONS DTSTART;VALUE=DATE-TIME:20220714T140900Z DTEND;VALUE=DATE-TIME:20220714T142900Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-272@events.sinp.msu.ru DESCRIPTION:Speakers: Tatjana Chuvilskaya (SINP MSU)\nExperiments which we re performed by use of the alpha-particle beam of SINP MSU cyclotron are t he subject of the present talk. Results of the investigations of the relat ive yield of high-spin and low-spin isomers in reactions 86Sr (α\,n)89Zr\ , 112Sn(α\,n)115Te\, 134Ba (α\,n)137Ce in the energy range of the alpha particles 15 – 31 MeV based on off-beam measurements of induced activity of members of the isomeric pair are presented. \nUniquely large isomeric cross-section ratios for the first and the second reactions are obtained. The features of the third reaction\, which are promising for its applicati on in fundamental research\, are revealed. The first of the reactions can also be used as an injection reaction for generating beams of high-spin is omers. \nQuality of the description of such reactions by popular computer codes is analyzed and some problems of these codes are detected.\n\nhttps: //events.sinp.msu.ru/event/8/contributions/272/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/272/ END:VEVENT BEGIN:VEVENT SUMMARY:TalysLib: a ROOT-based toolkit for nuclear data access DTSTART;VALUE=DATE-TIME:20220712T145000Z DTEND;VALUE=DATE-TIME:20220712T151000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-280@events.sinp.msu.ru DESCRIPTION:Speakers: Nikita Fedorov (JINR)\nInformation about nuclear rea ctions and properties of nuclei is often needed during nuclear data proces sing. Access to the nuclear databases from applied software is often diffi cult because of complex file format or database structure. To simplify usa ge of the nuclear data a specific toolkit TalysLib was developed. \nTalysL ib is a ROOT-based C++ object-oriented library. It uses wide capabilities of ROOT [1] for data visualization and transformations. The main source of the evaluated data for TalysLib is the TALYS [2] program. Information abo ut nuclear structure is extracted from RIPL-3 [3]. Work on the ENDF [4] d ata and preprocessed EXFOR data [5] support is in process. \nTalysLib can be used for optimization of the theoretical model parameters using MINUIT package which is included in ROOT.\nThe structure of the TalysLib and its main features will be presented. Current version of the TalysLib is availa ble on https://github.com/terawatt93/TalysLib. \n\n1. R. Brun\, F. Rademak ers. Nucl. Inst. & Meth. in Phys. Res. A 389 (1997) 81-86.\n2. A. J. Konin g\, S. Hilaire\, M. C. Duijvestijn «TALYS-1.0»\, Proceedings of the Int ernational Conference on Nuclear Data for Science and Technology. EDP Scie nces\, 211(2007).\n3. R. Capote\, M. Herman\, P. Oblozinsky et al. Nuclear Data Sheets. 110\, 3107(2009).\n4. D.A. Brown\, M.B. Chadwick\, R. Capote et al. Nucl. Data Sheets 148\, 1(2018).\n5. A. Koning. IAEA NDS Document Series IAEA(NDS)-235 (2020). https://www-nds.iaea.org/talys/tutorials/exfo rtables.pdf\n\nhttps://events.sinp.msu.ru/event/8/contributions/280/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/280/ END:VEVENT BEGIN:VEVENT SUMMARY:Photoneutron Cross Sections Of Cobalt DTSTART;VALUE=DATE-TIME:20220713T130500Z DTEND;VALUE=DATE-TIME:20220713T132500Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-262@events.sinp.msu.ru DESCRIPTION:Speakers: Alexandra Druzhinina (Lomonosov Moscow State univers ity\, Faculty of Physics)\n**PHOTONEUTRON CROSS SECTIONS OF COBALT**\n\nA. V. Druzhinina$^{1}$\, S. S. Belyshev$^{1\,2}$\, V. V. Khankin$^{2}$\, A. A. Kuznetsov$^{1\,2}$ \n*$^{1}$Lomonosov Moscow State University\, Moscow\ , Russia\; $^{2}$Skobeltsyn Institute of Nuclear Physics\, Lomonosov Mosco w State University\, Moscow\, Russia* \n E-mail: alexdruzhinina@gmail.com\ n\nFrom measurements of gamma ray activities\, induced by irradiating $^{5 9}$Co with 55 MeV bremsstrahlung\, the yields of the reactions (γ\,n)\, ( γ\,2n)\, (γ\,3n)\, (γ\,2pn) were determined. Absolute yields were obtai ned by reference to cross section data for the Cu(γ\,n) process. The isom eric yield ratio (Ym/Yg) of $^{58}$Co\, which was measured at this energy\ , is 1.255±0.004. This value is in a good agreement with previous experim ental data\, such as 1.33±0.09 at the maximum beam energy equel 54 MeV [1 ].\nThe flux-weighted average cross-sections for the (γ\,n)\, (γ\,2n) re actions of $^{59}$Co are 18.53±0.03\, 6.99±0.04 mb\, respectively. They were compared with the flux-weighted average cross-sections obtained from other experimental data\, based on mono-energetic and bremsstrahlung data\ , and theoretical predictions. These results of current experiment are low er then results\, obtained by Alvarez [2] for (γ\,n) reaction\, and highe r for (γ\,2n) reaction\, which are 22.6 mb and 6.19 mb respectively. \nTh e theoretically simulated $^{59}$Co(γ\,n)$^{58}$Co\, $^{59}$Co(γ\,2n)$^{ 57}$Co reaction average cross-sections based on TALYS show a general agree ment with experimental data (18.58\, 6.69 mb respectively).\n\n\n1. H. Lic hblau\, A. Goldmann\, Z. Phys.\, 205\, No. 1\, 47 (1967).\n2. R.A. Alvarez \, B.L. Berman\, Phys. Rev. C\, Vol. 20\, 1 (1979).\n\nhttps://events.sinp .msu.ru/event/8/contributions/262/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/262/ END:VEVENT BEGIN:VEVENT SUMMARY:Segmented HPGe Detector for Nuclear Reactions Research DTSTART;VALUE=DATE-TIME:20220712T151000Z DTEND;VALUE=DATE-TIME:20220712T153000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-291@events.sinp.msu.ru DESCRIPTION:Speakers: Артём Быстряков ()\nThis work presents the results of a study of the new true coaxial high-purity germanium p-ty pe detector with a segmented n+ region. One of the main features of the de tector is flowing endcap\, which is allow to place a source or target insi de of the detector. Thanks to it and six-fold segmentation of the crystal\ , it is possible to determine the direction of individual photons emitted from the source or during a nuclear reaction between ion beam and a target inside the ionizing radiation source. At the same time the flowing endcap give’s possibility to study not only γγ\, but also αγγ- or βγγ- correlations\, by the possibility to install the six-fold Si-detector ins ide of the HPGe detector.\n\nhttps://events.sinp.msu.ru/event/8/contributi ons/291/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/291/ END:VEVENT BEGIN:VEVENT SUMMARY:Sub Coulomb barrier d+208Pb scattering in the time-dependent basis function approach DTSTART;VALUE=DATE-TIME:20220712T072000Z DTEND;VALUE=DATE-TIME:20220712T074000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-201@events.sinp.msu.ru DESCRIPTION:Speakers: Peng Yin ()\, Xingbo Zhao (Institute of Modern Physi cs\, Chinese Academy of Sciences)\, James P. Vary ()\nWe investigate the s cattering of the deuteron on 208Pb below the Coulomb barrier based on the non-perturbative time-dependent basis function (tBF) approach[1]. We obtai n the bound and discretized scattering states of the projectile\, which fo rm the basis representation of the tBF approach\, by diagonalizing a reali stic Hamiltonian in a large harmonic oscillator basis. \nWe find that the higher-order inelastic scattering effects are noticeable for sub barrier s catterings with the tBF method. By considering all the possible electric d ipole (E1) transition paths among all the states involved in the tBF appro ach and taking into account the corrections of the polarization potential to Rutherford trajectories\, we have successfully reproduced experimental sub Coulomb barrier elastic cross section ratios with the tBF approach. We find that both the internal E1 transitions of the deuteron projectile and the corrections of the polarization potential to the classical Rutherford trajectories are essential for reproducing experimental data in these sub barrier experiments. More specifically\, the correction of the polarizati on potential to the Rutherford trajectory is dominant in reproducing the d ata at very low bombarding energies\, whereas the role of internal transit ions of the deuteron projectile induced by the E1 interaction during the s cattering becomes increasingly significant at higher bombarding energies. \n\n1. Peng Yin\, Weijie Du\, Wei Zuo\, Xingbo Zhao\, James P. Vary\, arXi v: 1910.10586 [nucl-th].\n\nhttps://events.sinp.msu.ru/event/8/contributio ns/201/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/201/ END:VEVENT BEGIN:VEVENT SUMMARY:YIELDS AND ENERGY DISTRIBUTIONS OF α-PARTICLES IN SPONTANEOUS TER NARY NUCLEAR FISSION DTSTART;VALUE=DATE-TIME:20220712T093000Z DTEND;VALUE=DATE-TIME:20220712T095000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-224@events.sinp.msu.ru DESCRIPTION:Speakers: Larisa Titova (Voronezh State University)\nIn [1\,2] \, a virtual mechanism of ternary fission of the nucleus (A\, Z) was propo sed\, which is considered as a two-stage process\, when at the first stage an α-particle with kinetic energy $T_{\\alpha}$ close to the height of its Coulomb barrier emits from the specified nucleus\, with the formation of a virtual state of the intermediate nucleus (A – 4\, Z – 2)\, which at the second stage is involved in binary fission. Part of the energy of the emitted long-ranged α-particle is taken by reducing the heat of fissi on of the intermediate nucleus (A – 4\, Z – 2) by ($T_{\\alpha}-Q_{\\a lpha}$ )\, where $Q_{\\alpha}$ is the heat of the true α-decay of the nu cleus (A\, Z). The energy distribution $W_{\\alpha f}$ and yield $N_{\\al pha}$ of the α-particles\, taking into account the proximity of the fiss ion widths of the nuclei (A\, Z) and (A – 4\, Z – 2) from the configu ration (0) of these nuclei with a neck of radius $R_{neck}$ between two f ission prefragments\, are defined as\n$$ W_{\\alpha f}= \\frac{1}{2\\pi} \ \frac{(\\Gamma_{\\alpha}^A)^0}{(Q_{\\alpha}^A-T_{\\alpha})^2}=\\omega_{\\a lpha} \\frac{\\hbar c \\sqrt {2 T_{\\alpha}} }{2R_{neck}\\sqrt{\\mu c^2}}P (T_{\\alpha})\; N_{\\alpha}=\\int W_{\\alpha f}(T_{\\alpha})dT_{\\alpha}\, $$\nwhere $(\\Gamma_{\\alpha}^A)^0$ is the width of the decay of the paren t nucleus from the configuration (0)\, $P(T_{\\alpha})$ is the permeabilit y factor of the Coulomb barrier formed by the sum of the nuclear $V_n(r\,\ \theta)$ and Coulomb $V_C(r\,\\theta)$ interaction potentials of α-pa rticle and deformed fission fragments \, $\\omega_{\\alpha}$ is the proba bility of α-particle formation in the parent nucleus\, $\\mu$ is the red uced mass of ternary fission products. Calculating the permeability factor $P(T_{\\alpha})$ of the Coulomb barrier by an α-particle as $P(T_{\\alph a})=exp(- \\frac {2}{\\hbar c }\\int_{R_A}^{R} \\sqrt {2\\mu c^2(V_n(r\, \ \theta)+V_C(r\,\\theta))-T_{\\alpha})} d{r}$\, when using the deformed Cou lomb potential\, Saxon-Woods potential and proximity potential [4] for the nuclear potential\, the energy distributions and yields of α-particles f or $^{248}Cm$\, $^{250}Cf$ and $^{252}Cf$ nuclei are obtained\, which are consistent with the experimental energy distributions and yields of α-par ticles for these nuclei [5 – 6] .\n\n1. S.G. Kadmensky et al. PEPAN 63\, 620 (2022)\n2. S.G. Kadmensky\, L.V. Titova\, D.E. Lyubashevsky Phys. At. Nucl. 83\, 326 (2020)\n3. L.V. Titova\, Bulletin MSU. Ser. 3: Physics. As tronomy. № 5\, 64 (2021)\n4. J. Blocki\, J. Randrup\, W.J. Swiatecki\, C.F. Tsang\, Ann. Phys. (N.Y.) 105\, 427 (1977)\n5. S.Vermote et al.\, Nuc l. Phys. A806\, 1 (2008)\n6. O.Serot\, N.Carjan\, C.Wagemans\, Eur. Phy s. J. A. 8\, 187 (2000)\n\nhttps://events.sinp.msu.ru/event/8/contribution s/224/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/224/ END:VEVENT BEGIN:VEVENT SUMMARY:Fission modes in 238Np populated by 6Li+232Th DTSTART;VALUE=DATE-TIME:20220712T080000Z DTEND;VALUE=DATE-TIME:20220712T082000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-227@events.sinp.msu.ru DESCRIPTION:Speakers: Tathagata Banerjee (Joint Institute for Nuclear Rese arch\, Dubna\, Russia)\nThe mass-total kinetic energy(M-TKED) of fission f ragments of the reaction 6Li+232Th were measured at two laboratory energie s Elab = 28.5 and 40 MeV [1] using the CORSET set up at the Flerov Laborat ory of Nuclear Reaction. The transfer induced fission and/or the breakup o f 6Li mainly into α and d clusters contributes to the incomplete fusion i n this reaction. The binary events within the gate of 180±3.5 degree in t he fission fragment folding angle distribution have only been considered d iscarding the incomplete fusion events\, for multi-modal analysis.\n\nTwo dimensional M-TKEDs of the binary fragments of 6Li+232Th\, have been descr ibed by the multi-modal random neck rupture (MM-RNR) model [3]. Three mode s were necessary to fit the data properly. Channel probabilities and the c haracteristics of different fission modes are obtained and discussed. The average kinetic energy release in fission obtained from Viola systematic [4] matches well with that of the Standard 2 mode\, but not with that of b road liquid drop like Superlong mode. This is associated with the decrease of the total kinetic energy associated with asymmetric fission with incre asing excitation [5\, 6] due to fading out of shell effects at high excita tion energies. The slope of asymmetric to symmetric fission yields (when p lotted against the excitation energy) of 6Li+232Th is found to be similar to that of previously reported 18O+208Pb.\n\n1. I. M. Itkis et al.\, Phys. Lett. B640\, 23 (2006)..\n2. E. M. Kozulin et al.\, Instrum. Exp. Tech. 5 1\, 44 (2008).\n3. U. Brosa\, S. Grossmann and A. Müller\, Phys. Rep. 197 \, 167 (1990).\n4. V. E. Viola Jr.\, Nucl. Data Sheets A1\, 391 (1966)\; V . E. Viola\, K. Kwiatkowski\, and M. Walker\, Phys. Rev. C 31\, 1550 (1985 ).\n5. A. Pica et al.\, Phys. Rev. C 102\, 064612 (2020).\n6. V. Yu. Denis ov\, I. Yu. Sedykh\, Phys. Lett. B 824\, 136814 (2022).\n\nhttps://events. sinp.msu.ru/event/8/contributions/227/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/227/ END:VEVENT BEGIN:VEVENT SUMMARY:Cross section of neutrino absorption by 82Se nuclei DTSTART;VALUE=DATE-TIME:20220715T082000Z DTEND;VALUE=DATE-TIME:20220715T084000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-331@events.sinp.msu.ru DESCRIPTION:Speakers: Sergei Semenov (Russian Research Centre "Kurchatov I nstitute")\nSelenium-82 is a perspective isotope for neutrino investigatio ns. Recently in experiments\, produced with the help of NEMO-3 detector [ 1]\, which is composed of a tracker and a calorimeter\, capable to reconst ruct the full topology of  processes and measurements\, performed at CUPID-0 setup [2]\, based on Zn82Se scintillating crystals\, operated as cryogenic bolometers\, nuclear mechanism of 82Se 22-decay have be en examined. It was shown\, that contribution of the single lowest excited 1+-level of intermediate nucleus 82Br dominates in the transition amplitu de. It should be noted that for 82Se the quantum numbers of intermediate n ucleus 82Br ground state are 5-\, so transition via this state is strongly suppressed. Contribution of excited 1+ -states to 22-transition am plitude was considered in [3]. \n The lowest excited 1+-level of 82Br\, E x=75 keV\, and corresponding Gamow-Teller strength have been determined in a high-resolution 82Se(3He\,t) 82Br charge-exchange experiment [4]. Low v alue of threshold for neutrino absorption reaction together with considera ble magnitude of transition strength to 75 keV (1+) state make 82Se to be interesting object both for solar neutrino detection and for measurements\ , aimed at investigation of new physics in calibration experiments. \n The cross sections of absorption by 82Se nucleus of neutrinos\, produced by a rtificial sources 51Cr\, 37Ar\, 65Zn are calculated. The parameters of exp erimental setup on the base 82Se for searching of new types of neutrino ar e discussed. \n\n\n1. R. Arnold et al \, Eur. J. Phys. 78\, 821 (2018)\n2. O. Azzolini et al\, Phys. Rev. Lett. 123\, 262501 (2019)\n3. S.V. Semenov \, AIP Conf. Proc. 942\, 67 (2007)\n4. D. Frekers et al\, Phys. Rev. C 94\ , 014614 (2016)\n\nhttps://events.sinp.msu.ru/event/8/contributions/331/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/331/ END:VEVENT BEGIN:VEVENT SUMMARY:PHOTOFISSION OF 238U IN THE ENERGIES RANGE OF GIANT DIPOLE RESONAN CE DTSTART;VALUE=DATE-TIME:20220712T074000Z DTEND;VALUE=DATE-TIME:20220712T080000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-308@events.sinp.msu.ru DESCRIPTION:Speakers: Omar Albaghdadi ()\nThe yields and average cross sec tions of the photonuclear reactions $^{238}U(\\gamma\,n)$ and $^{238}U(\\g amma\,F)$ are measured at a maximum bremsstrahlung energy of 55 $MeV$. Bas ed on the analysis of the residual activity spectra of the products of the $^{238}U(\\gamma\,F)$ photofission reaction\, the cumulative yields were measured for about 40 mass chains. The cross sections for the reactions $^ {238}U(\\gamma\,n)$ and $^{238}U(\\gamma\,F)$ are estimated and compared w ith the results of experiments on quasi-monochromatic beams\, estimated cr oss sections\, and calculations using the TALYS program. The post-neutron mass yield distribution of $^{238}U(\\gamma\,F)$ photofission has been obt ained (fig. 1). The behavior of the symmetric and asymmetric modes of phot ofission is analyzed as a function of the average excitation energy of the fissile nucleus.\n\nFig. 1. Approximation by five Gaussian functions of the total mass distribution $Y_{M}(A)$ of products formed as a result of $ ^{238}U$ photofission induced by bremsstrahlung photons at an electron acc elerator energy of 55 $MeV$.\n\nhttps://events.sinp.msu.ru/event/8/contrib utions/308/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/308/ END:VEVENT BEGIN:VEVENT SUMMARY:NEW MODES OF COLLINEAR CLUSTER TRI-PARTITION OF $^{252}$Cf(sf) DTSTART;VALUE=DATE-TIME:20220712T091000Z DTEND;VALUE=DATE-TIME:20220712T093000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-349@events.sinp.msu.ru DESCRIPTION:Speakers: Yuri Pyatkov (JINR & MEPHI)\nIn our previous publica tions [1–4] we discussed various manifestations of a new decay channel o f the low excited heavy nuclei called collinear cluster tri-partition (CCT ). In the frame of the essentially modified experimental method\, addition al linear structures corresponding to the relations M$_1$ $+$ M$_2$ $=$ co nst and M$_1$ $–$ M$_2$ $=$ const for the masses M1 and M2 of the fissio n fragments (FFs) from $^{252}$Cf(sf) detected in the opposite spectromete r arms form the rhombic-like configurations with the vertices correspondin g to the magic nuclei. The structures are statistically reliable\, they ar e conditioned by a pronounced and complex correlation between the masses o f the FFs measured independently. Possible physical scenario standing behi nd the structures are discussed.\n\nhttps://events.sinp.msu.ru/event/8/con tributions/349/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/349/ END:VEVENT BEGIN:VEVENT SUMMARY:TIME-DEPENDENT DESCRIPTION OF THE REACTION $^{28}$Si($^{11}$Be\,$^ {10}$Be) AT LOW ENERGIES DTSTART;VALUE=DATE-TIME:20220712T131000Z DTEND;VALUE=DATE-TIME:20220712T133000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-206@events.sinp.msu.ru DESCRIPTION:Speakers: Aidos Azhibekov (JINR\, Dubna)\nThe evolution of the probability density of the outer weakly bound neutron of the $^{11}$Be nu cleus (Fig. 1) in collision with the $^{28}$Si nucleus is described based on numerical solution of the time-dependent Schrödinger equation [1\, 2]. The probabilities of outer neutron removal due to the processes of neutro n transfer and nuclear breakup are determined. The results of calculating the cross sections for removal of the outer neutron from the $^{11}$Be nuc leus are close to the experimental data [3]. Numerical solution of the tim e-dependent Schrödinger equation taking into account spin-orbit interacti on [4−6] makes it possible to study the dynamics of removal of the outer weakly bound neutron of the $^{11}$Be nucleus and to determine the contri butions of the neutron transfer channels and nuclear breakup in low-energy collisions with a target nucleus.\n\nFig. 1. Evolution of the probability density for the outer neutron of the $^{11}$Be nucleus in the collision $ ^{11}$Be + $^{28}$Si at beam energy 55 MeV in the reference frame moving r elative to the laboratory frame with a constant velocity equal to the velo city of the projectile nucleus at a sufficiently large distance from the t arget nucleus. The course of time corresponds to the direction from left t o right.\n\n1. A.K. Azhibekov\, V.V. Samarin\, and K.A. Kuterbekov\, Chin. J. Phys. 65\, 292 (2020).\n2. A.K. Azhibekov *et al*.\, Phys. Atom. Nucl. 84\, 635 (2021).\n3. F. Negoita *et al*.\, Phys. Rev. C 59\, 2082 (1999). \n4. V.V. Samarin\, Phys. Atom. Nucl. 78\, 128 (2015).\n5. Yu.E. Penionzhk evich\, Yu.G. Sobolev\, V.V. Samarin *et al*.\, Phys. Rev. C 99\, 014609 ( 2019).\n6. V.V. Samarin\, Bull. Russ. Acad. Sci.: Phys. 84\, 990 (2020).\n \nhttps://events.sinp.msu.ru/event/8/contributions/206/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/206/ END:VEVENT BEGIN:VEVENT SUMMARY:THE CROSS-SECTION OF NUCLEAR-TUNGSTEN INTERACTIONS OBTAINED WITH M EASUREMENTS OF COSMIC RAYS BY PAMELA DTSTART;VALUE=DATE-TIME:20220715T072000Z DTEND;VALUE=DATE-TIME:20220715T074000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-367@events.sinp.msu.ru DESCRIPTION:Speakers: Olga Golub (NRNU MEPhI)\nThe aim of this work is to study the cross-section of the inelastic interactions of nuclei with tungs ten based on the data of PAMELA space experiment [1]. This instrument is a magnetic spectrometer designed to study fluxes of charged particles in co smic rays\, which was launched into the near-Earth orbit aboard the Resurs -DK1 satellite\; data collection continued from 2006 to 2016. PAMELA inclu des a set of detectors which helps to identify the particles including the ir magnitude and sign of charge\, rigidity\, velocity\, mass and energy.\n So\, we can select from the PAMELA data a necessary component of cosmic ra ys with known particles and their energy coming at a known angle. At the s ame time\, another detector - a coordinate-sensitive calorimeter with a tu ngsten absorber plays a role of target for these particles. This looks lik e an experiment in particle physics on accelerators with formation of a be am of particles and observation of its interaction in target. Thus\, it be comes possible to study the characteristics of nuclear-nuclear interaction s with a large number of different nuclei in a beam according to chemical composition of cosmic rays in a wide energy range from hundreds of MeV to ~TeV.\nA similar method is used in ground-based observations of ultrahigh- energy cosmic rays\; however\, in this work\, we use the previously propos ed method relies on a much larger amount of information about cosmic ray p articles due to the precision nature of the PAMELA measurements [2].\nIn t he report\, we present the experimental cross sections for the interaction of nuclei from protons to carbon with tungsten nuclei obtained by the des cribed method. Obtained results compared with the cross-sections reconstru cted from the simulation data coming from Geant4 software package [3]\, wi th measurements at accelerators and existing theoretical models.\nResults can be used to improve our knowledges about nuclear forces and expand the standard Geant4 hadronic models and other numerical packages describing th e interaction of particles with matter.\n\n1. O. Adriani\, G. Barbarino\, G.A. Bazilevskaya et al\, PAMELA - A Payload for Antimatter Matter Explora tion and Light-nuclei Astrophysicsg\, Astroparticle Physics\, V.27\, 2007. \n2. О. Голуб\, А. Майоров\, Определение сече ния неупругого взаимодействия протонов и ядер гелия с вольфрамом по данным косм ического эксперимента PAMELA\, Учен. зап. фи з. фак-та Моск. ун-та. 2019\n3. S. Agostinelli et al.\, Gean t4 - A Simulation Toolkit\, Nucl. Instrum. Meth. A 506\, 2003.\n\nhttps:// events.sinp.msu.ru/event/8/contributions/367/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/367/ END:VEVENT BEGIN:VEVENT SUMMARY:THUNDERSTORM FLASHES AS THE MECHANISM OF 14C RADIOISOTOPE GENERATI ON DTSTART;VALUE=DATE-TIME:20220712T125000Z DTEND;VALUE=DATE-TIME:20220712T131000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-617@events.sinp.msu.ru DESCRIPTION:Speakers: Vladimir Lyashuk (Institute for Nuclear Research (IN R) of the Russian Academy of Sciences)\nAn atmospheric production of 14C r adioisotope goes by the 14N(n\,p)14C reaction under cosmogenic fluxes and this process is considered as the main source of radiocarbon creation whic h rate of accumulation is evaluated as ~ 6.6 kg per year. An exclusively o pportunities of dating based on the analysis of 14C concentration in the v ery old and ancient organic samples led to the discovery of short-term sec ular variation of radiocarbon in tree rings [1] and to the hypothesis of 1 4C generation under thunderstorms flashes. The nature of the lightning phe nomena in fact is connected with the development of electron avalanche in the strong atmospheric electric fields (~ 300 kV/m and more) [2]. The very fast electron avalanche growth in the cloud electric fields ensures the phenomenon of terrestrial $\\gamma$-ray bursts [2\,3]. These energetic γ -rays generate the photonuclear reactions on atmospheric isotopes (with si gnificant yield for hard photons $E_{\\gamma}$ = 20-60 MeV) as 14N$(\\gamm a \,n)$13N\, 16O$(\\gamma \,n)$15O\, 40Ar$(\\gamma \,n)$39Ar. An increase of neutron flux causes the next series of $(n\,\\gamma)$\, (n\,a)\, (n\,p) -reaction and the 14N(n\,p)14C is the top important for dating problem. Fo r evaluating of the radiocarbon generation under thunderstorm conditions ( and creation of another atmospheric isotopes too) it was proposed the mode l (realized in the spherical-layer geometry). The calculation were made at the several altitudes of the lower part of the atmosphere at the altitude s from 1 up to 15 km (covering the possible heights of detected lighting) [4\,5]. Decrease of the atmospheric densities at increase of the altitude is critical for electron avalanche evolution and is included in the model. It was obtained the yield from thunderstorm 14C generation evaluated as 1 e-4% relative to cosmogenic one. The results support the hypothesis that r adiocarbon rise in the old tree rings (at AD 774–775) [1] can be explain ed by increased Sun activity of the Sun at this time interval.\n\n1. F. Mi yake\, K. Nagaya\, K. Masuda\, T. Nakamura\, Nature 486\, (2012) 240. [doi .org/10.1038/nature11123][1]\n2. Joseph R. Dwyer · David M. Smith · Stev en A. Cummer. High-Energy Atmospheric Physics: Terrestrial Gamma-Ray Flash es and Related Phenomena. Space Sci Rev (2012) 173:133–196. [DOI 10.100 7/s11214-012-9894-0][2].\n3. Leonid Babich\, Thunderous nuclear reactions. Nature\, v.551 (2017) 443. [doi.org/10.1038/d41586-017-07266-w][3]\n4. V. I. Lyashuk\, Evaluation of Radiocarbon 14C Yield Under Conditions of Thun derstorms\, Geophysical Research Letters\, 48\, e2021GL095357. [https://do i.org/10.1029/2021GL095357][4]\n5. V.I. Lyashuk\, ArXiv 2011.07417.\n\n\n [1]: https://www.nature.com/articles/nature11123\n [2]: https://link.spr inger.com/article/10.1007/s11214-012-9894-0#citeas\n [3]: https://www.nat ure.com/articles/d41586-017-07266-w\n [4]: https://doi.org/10.1029/2021GL 095357\n\nhttps://events.sinp.msu.ru/event/8/contributions/617/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/617/ END:VEVENT BEGIN:VEVENT SUMMARY:RESULTS OF SIMULATION OF TOTAL AND DIFFERENTIAL CROSS SECTIONS FOR 236U FISSION BY NEUTRONS WITH ENERGY UP TO 200 MeV DTSTART;VALUE=DATE-TIME:20220712T120000Z DTEND;VALUE=DATE-TIME:20220712T122000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-323@events.sinp.msu.ru DESCRIPTION:Speakers: Alexey Barabanov (National Research Centre "Kurchato v Institute")\nIn [1]\, it was rightly noted that “nuclear fission remai ns the most complex topic in applied nuclear physics”. The current state of the theory based on the model of transition states at fission barriers does not allow one to reproduce the fission cross section of a nucleus by neutrons as a function of their energy without using a significant number of fitting parameters. This is partly due to the lack of information abou t the spectra of transition states. In our opinion [2\,3]\, the understand ing of the fission mechanism can be improved by using data on the angular distribution of fragments or\, in other words\, on the ratio of the differ ential fission cross section to the total one. The idea is that the angula r distribution of fragments is determined by the distribution of the fissi on probability over the projection K of the nuclear spin on the axis of de formation on a barrier\, which in turn depends on what values of K charact erize the rotational bands of transition states on the barrier. Thus\, the angular distribution of fragments can provide important information about the spectrum of transition states. \nPreviously\, we analyzed data on fis sion cross sections and angular distributions of fission fragments in the reactions 237Np(n\,f) [3] and 240Pu(n\,f) [2]. The present work is devoted to the reaction of 236U(n\,f). The parameters of the fission barriers tak en from [1] were slightly changed\, which made it possible to reproduce\, using the TALYS-1.9 program [4]\, the energy dependence of the total fissi on cross section in the range of incident neutron energy from 0.5 to 120 M eV. Using a modified version of the same program gives a good description of the angular anisotropy W(0º)/W(90º) of the fission fragments within t he statistical model of the probability distribution of fission over the n umber K in a wide range from 2.5 to 300 MeV. Of particular interest is the low-energy region from 0.5 to 2.5 MeV\, in which the energy behavior of a ngular anisotropy may be related to the structure of the transition state spectrum at the 237U fission barrier. \n\n1. R. Capote et al. Nucl. Data S heets 110\, 3107 (2009).\n2. A. S. Vorobyev et al.\, JETP Lett. 112\, 323 (2020).\n3. A. L. Barabanov et al.. EPJ Web Conf. 256\, 00003 (2021).\n4. A. J. Koning\, S. Hilaire\, M. C. Duijvestijn. Proc. Int. Conf. on Nuclear Data for Science and Technology (2007\, Nice\, France)\; EDP Sciences. 20 08. P.211.\n\nhttps://events.sinp.msu.ru/event/8/contributions/323/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/323/ END:VEVENT BEGIN:VEVENT SUMMARY:Influence of cluster structure to the mechanism of nuclear reactio ns DTSTART;VALUE=DATE-TIME:20220712T080000Z DTEND;VALUE=DATE-TIME:20220712T082000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-650@events.sinp.msu.ru DESCRIPTION:Speakers: Talgat Issatayev (JINR)\nIn the interaction reaction s of weakly bound cluster nuclei\, the structure of these nuclei can manif est itself with a high probability. It is expressed in cross sections for these processes\, in particular\, in the multinucleon transfer reaction an d the transfer reaction of individual clusters [1\,2].\nIn order to study the influence of the cluster structure on the mechanism of nuclear reactio ns\, we studied the interaction reactions 6Li+9Be\,12C at an energy of 68 MeV. The experiment has been performed at the U-400M cyclotron\, FLNR\, JI NR. The angular distributions of the products formed in these reactions we re measured in the range of 10-120 º in the c.m system. The following rea ction channels were studied: 9Be(6Li\,6Li)9Be\, 9Be(6Li\,7Li)8Be\, 9Be(6Li \,6He)9B\, 9Be(6Li\, 4He)11B\, 12C(6Li\,6Li)12C\, 12C(6Li\,7Be )11B in gro und and excited states. The obtained experimental data were analyzed withi n the framework of the optical model and the DWBA method [3].\n\n\n\n\n\n\ n1. Yu E Penionzhkevich\, R.G. Kalpakchieva\, Light Exotic Nuclei Near the Boundary of Neutron Stability\, World Scientific Publishing Co Pte L td (2021)\n2. Yu E Penionzhkevich\, et.al\, Eur. Phys. J. A 31\, 185-194 ( 2007)\n3. NRV web knowledge base on low-energy nuclear physics.http://nrv. jinr.ru/.\n\nhttps://events.sinp.msu.ru/event/8/contributions/650/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/650/ END:VEVENT BEGIN:VEVENT SUMMARY:Influence of the entrance channel asymmetry on the fission propert ies of excited 180Hg nuclei DTSTART;VALUE=DATE-TIME:20220712T072000Z DTEND;VALUE=DATE-TIME:20220712T074000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-611@events.sinp.msu.ru DESCRIPTION:Speakers: Kirill Kulkov (JINR)\nInfluence of the entrance chan nel asymmetry on the fission properties of excited $^{180}$Hg nuclei \n\nK .A. Kulkov$^{1\,2}$\, E.M. Kozulin$^{1\,2}$\, A.A. Bogachev$^1$\, G.N. Kny azheva$^{1\,2}$\, I.M. Itkis$^1$\, K.V. Novikov$^{1\,2}$\, I.V. Vorobiev$^ 1$ \n$^1$Flerov Laboratory of Nuclear Reactions\, Joint Institute for Nucl ear Research (JINR)\, Dubna\, Moscow oblast\, 141980 Russia\n$^2$Dubna Sta te University\, Dubna\, Moscow oblast\, 141982 Russia\nE-mail: kulkov@jinr .ru\n\nFission of the pre-actinide nuclei is characterized as predominantl y symmetrical even at low excitation energies. Recently\, in experiments o n the β$^+$-delayed fission of the $^{180}$Tl nucleus [1]\, an asymmetric mass distribution of the fission fragments of its daughter nucleus $^{180 }$Hg with an excitation energy\nE$^*$<10.8 MeV was found. Note that the fo rmation of two fragments – semimagic nuclei $^{90}$Zr (N = 50\, Z = 40) – should be expected in the symmetric fission of this strongly neutron-d eficient nucleus. However\, the formation of a light fragment with a mass of 80 u and a heavy one of 100 u was found in the fission of $^{180}$Hg. T herefore\, the study of the fission properties of pre-actinide nuclei is e xtremely important. \nThus\, we propose to study reactions $^{36}$Ar+$^{14 4}$Sm and \n$^{90}$Zr+$^{90}$Zr\, leading to the formation of the compound nucleus 180Hg in the wide range of excitation energies. In the $^{36}$Ar+ $^{144}$Sm reaction fusion-fission and fast fission are observed. Special M-TKE matrix subtraction procedure [2] allowed to separate these two proce sses. The reaction $^{90}$Zr+$^{90}$Zr was measured in wide energy range. The mass asymmetry of the entrance channel in this reaction is equal to 0. At high incident energies all three possible reaction mechanisms - fusion -fission\, quasifission and fast fission - contribute to the M-TKE distrib utions of the fissionlike reaction products. The separation of the two-dim ensional M-TKE distributions of binary fragments corresponding to differen t reaction mechanisms allowed to obtain the main characteristics of each p rocess. Double-arm time-of-flight spectrometer CORSET was used to measure M-TKE distributions.\n\n 1. A.N. Andreyev\, J. Elseviers\, M. Huyse et al. \, Phys. Rev. Lett. 105\, 252502 (2010).\n 2. E.M. Kozulin et al.\, Phys. Lett. B 819 (2021) 136442.\n\nhttps://events.sinp.msu.ru/event/8/contribut ions/611/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/611/ END:VEVENT BEGIN:VEVENT SUMMARY:PROBLEMS OF DESCRIPTION OF P-EVEN T-ODD ASYMMETRIES IN NUCLEAR FI SSION REACTIONS WITH THE EMISSION OF LIGHT PARTICLES IN THE FRAMEWORK OF T HE SEMICLASSICAL APPROACH DTSTART;VALUE=DATE-TIME:20220712T101000Z DTEND;VALUE=DATE-TIME:20220712T104000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-590@events.sinp.msu.ru DESCRIPTION:Speakers: Dmitrii Lyubashevsky (Voronezh state university)\nIn [1–2]\, the coefficients of P-even T-odd asymmetries in the cross sec tions for nu-clear fission reactions by cold polarized neutrons with the e mission of light particles p were found\, expressed in terms of experime ntal particle count rates p in coincidence with light fission fragments fo r the directions of polarization vector either along or against the Y axis. For the theoretical description of these coefficients in the case of -particles us-ing the semiclassical method of trajectory calculations\, the formula [1] (1) was proposed. Its first term\, expressed through the rotation angle \, took into account the influence of the Coriolis in-ter action of the spin of a compound fissile system (CFS) rotating around an a xis perpendicular to its symmetry axis on the angular distributions of bot h fission fragments ( ) and -particles ( ). The appearance of the second term in (1) was based on the hypothesis [1] about the change in the angu lar distribution of -particles under the action of the Coriolis interacti on associated with the collective rotation of the CFS around the fission a xis\, which turns out to be possible when the axial symmetry of the CFS is violated due to taking into ac-count its collective transverse oscillatio ns\, in the vicinity of the rupture point. The coefficients calculated i n [1] using formula (1)\, for the positive values of the angles found in the trajectory method\, turned out to be in satisfactory agreement with t he corresponding ex-perimental coefficients [1] for target nuclei 233U\, 235U\, 239Pu и 241Pu. Formula (1) can be generalized to the case of emis sion of evaporative neutrons and -quanta\, taking into account the fact that the influence of two types of Coriolis interaction on the angular dis tribu-tions of these particles can be neglected\, since these interactions are small at the moment of emission of evaporative particles due to very large values of the moment of inertia CFS. This leads to the exclusion of the quantity in (1) and the replacement of the angle by the angle . T he coefficients calculated using the obtained formula turned out to be i n satisfactory agreement with similar experimental coefficients from [2] in the case of the 235U target nucleus\, but has opposite signs for the 2 33U target nucleus. The last result demontrates the need to look for an al ternative approach to the description of the coefficients \, different fr om the semiclassical approach.\n\nhttps://events.sinp.msu.ru/event/8/contr ibutions/590/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/590/ END:VEVENT BEGIN:VEVENT SUMMARY:ELASTIC PROTON SCATTERING BY NUCLEI 7Ве AND 8В AT ENERGY 700 Me V DTSTART;VALUE=DATE-TIME:20220712T143000Z DTEND;VALUE=DATE-TIME:20220712T145000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-326@events.sinp.msu.ru DESCRIPTION:Speakers: Onlassyn Imambek ()\nIn this paper\, based on Glaube r's diffraction theory\, we analyze the results of a recent experiment [1] on the scattering of protons by 7Ве and 8В nuclei at an energy of 0.7 GeV/nucleon\, in the range of momentum transfer 0.002≤ |t|≤ 0.05 (Гэ В/с)2. The experiments were carried out by the GSI-PNPI collaboration (G ermany-Russia) on the GSI radioactive beam (Darmstadt\, Germany) in invers e kinematics.\nIn our calculations\, the internal state of the 7Ве and 8 В nuclei under study are described on the basis of (α-τ) two- and (α- τ-p) three-particle cluster models\, respectively. The wave functions of these nuclei [2]\, obtained on the basis of the above cluster models\, des cribe well their static characteristics.\nThe parameters of the elementary NN- and Nα-amplitudes required for our calculations are taken from other works. However\, there are currently no data on elementary Nτ amplitudes in the scientific literature. In this connection\, we separately consider ed elastic p3He scattering in the kinematic region in which it corresponds to our calculations for proton scattering by 7Be and 8B. We succeeded in describing satisfactorily the experimental data on p3He scattering [3]. Fu rther\, the calculation scheme used here was transferred to calculations o n p7Be and p8B scattering.\nOur calculations of proton scattering by 7Ве and 8В are in good agreement with the data of [1]. However\, these exper iments were performed for small scattering angles. We carried out calculat ions up to scattering angles of ~ 50° and determined the contributions to the cross section from one-\, two-\, and three-fold scattering. At small angles\, single scattering dominates\, the contribution of double scatteri ng is compared with it in the region of 25°. The contribution of triple s cattering in elastic p8B scattering appears at 40°. In the future\, it is planned to carry out similar calculations on the scattering of π- and K- mesons and to carry out a comparative analysis of the obtained calculation s.\nThis work is carried out within the framework of the scientific projec t АР08855589\n\n1. A.V. Dobrovolsky et al. / Distribution of nuclear mat ter in proton-rich 7Be and 8B nuclei by elastic scattering of protons of i ntermediate energies in inverse kinematics/ Nuclear Physics A 989 (2019) 4 0–58\n2. Dubovichenko S.B. (2011) Thermonuclear processes of the Univers e. Almaty\, Fesenkov V.G. Astrophysical Institute "NTsRT" NSA RK\, 402. (i n Russian).\n3. Abdramanova G.B.\, Imambek O.\, Nadir A.\, Myrzabaeva M. / Elastic scattering of protons on 3He nuclei at intermediate energies / Pr oceedings of the Academy of Sciences of the Republic of Kazakhstan 1 (341) (2022) 117-123\n\nhttps://events.sinp.msu.ru/event/8/contributions/326/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/326/ END:VEVENT BEGIN:VEVENT SUMMARY:Comparison between elastic scattering of strongly bound α particl es and exotic 6He on a 12C target and the effect of the two-neutron halo o f 6He DTSTART;VALUE=DATE-TIME:20220712T103000Z DTEND;VALUE=DATE-TIME:20220712T105000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-655@events.sinp.msu.ru DESCRIPTION:Speakers: Ahmed Amer ()\nThe experimental angular distribution s for α-particles elastically\n scattered from the 12C nucleus in the ene rgy range of 48.7–386 MeV and\n for the 6He+12C nuclear system in the en ergy range of 5.9–493.8 MeV\n have been reanalyzed. Data analysis is per formed within the framework\n of both the optical model (OM) and the doubl e-folding optical model\n (DFOM). In this model\, the real part of the pot ential is generated\n using the double-folding procedures based on the eff ective M3Y\n interaction between projectile nucleons and target nucleons\, in\n addition to an imaginary part of the Woods-Saxon form. Two criteria\ n are used to observe the nature of 4He and 6He elastically scattered\nfro m 12C and the effect of the two-neutron halo structure of 6He.\nFirstly\, the extracted potential parameters are utilized for\ncalculating the refle xion coefficients ηL\, which are strongly\nrelated to the angular momentu m L. Secondly\, the reduction in reaction\ncross sections with the project ile’s energy.\n\nhttps://events.sinp.msu.ru/event/8/contributions/655/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/655/ END:VEVENT BEGIN:VEVENT SUMMARY:INVESTIGATION OF (γ\, αxn) REACTIONS ON 93Nb DTSTART;VALUE=DATE-TIME:20220713T143000Z DTEND;VALUE=DATE-TIME:20220713T144000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-368@events.sinp.msu.ru DESCRIPTION:Speakers: Pavel Remizov (MSU)\nThe study of the photon interac tions with atomic nuclei remains a topical experimental and theoretical ta sk at the present time. Despite the accumulated scientific base\, there is no unified theory describing the emission of charged particles for a wide range of nuclei. The main reason is the paucity of experimental data on t he emission of charged particles. In addition\, such studies are of great practical importance. Research of reactions with charged particle emission makes it possible to develop alternative channels for the radioactive iso topes’ production for nuclear medicine\, industry\, and etc.\nWe have st udied reactions with the emission of alpha particles using the induced act ivity method by 20 and 40 MeV bremsstrahlung beams on natural niobium targ ets weighing 2.1 g. The induced activity was measured in a low-background laboratory by a Canberra semiconductor spectrometer with an energy resolut ion of 2 keV on the 1332 keV 60Co gamma line. The 87\,88Y weighted average yields were measured for 40 MeV bremsstrahlung quanta and 88Y weighted av erage yield was measured for 20 MeV bremsstrahlung quanta for the first ti me. The following weighted average yields were obtained for Еbd=40 MeV: Y (88Y)=242±15 µb and Y(87Y)=176±15 µb\; for Еbd =20 MeV: Y(88Y)=970±9 0 μb.\nThe dominance of semi-direct processes is stated according to the simulation results within the TALYS 1.96 program code. The obtained result s are discussed.\n\nhttps://events.sinp.msu.ru/event/8/contributions/368/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/368/ END:VEVENT BEGIN:VEVENT SUMMARY:INVESTIGATION OF FISSION MODES OF 248Cf AND 254\,256Fm FORMED IN T HE REACTIONS WITH HEAVY IONS DTSTART;VALUE=DATE-TIME:20220715T122000Z DTEND;VALUE=DATE-TIME:20220715T124000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-649@events.sinp.msu.ru DESCRIPTION:Speakers: A.A. Ostroukhov (JINR)\nThe role of closed proton an d neutron shells in the fission of 248Cf* and 254\,256Fm* nuclei at excita tion energies from 40 to 56 MeV was studied. Earlier\, multimodal fission of the light 233Pa* [1] as well as the heavy No* [2] actinide nuclei was o bserved. Moreover\, for these nuclei the manifestation of the superasymmet ric fission mode was found. To check the presence of the fission modes in the central region of actinide nuclei the mass-energy distributions of fra gments formed in the 16O+232Th and 16\,18O+238U reactions at energies near the Coulomb barrier have been measured. The experiments were carried out at the U-400 and U-400M accelerators at the Flerov Laboratory of Nuclear R eactions using the double-arm time-of-flight CORSET spectrometer [3]. An i ncrease in the mass yields in the asymmetric region caused by the shell ef fects was observed. To describe the mass and energy distributions of the f ission fragments a multimodal analysis was performed. \n\nReferences:\n[1] A.N. Pan\, E.M. Kozulin\, I.M. Itkis et al.\, Bull. Russ. Acad. Sci. Phys .\, 2018\, vol. 82\, p. 721.\n[2] K.B. Gikal\, E.M. Kozulin\, I.M. Itkis e t al.\, Bull. Russ. Acad. Sci. Phys.\, 2018\, vol. 82\, p. 716. \n[3] E.M. Kozulin\, A.A. Bogachev\, M.G. Itkis et al.\, Instrum. Exp. Tech.\, 2008\ , vol. 51\, p. 44.\n\nThe work was supported by the Program # BR09158499 o f the Ministry of Energy of the Republic of Kazakhstan.\n\nhttps://events. sinp.msu.ru/event/8/contributions/649/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/649/ END:VEVENT BEGIN:VEVENT SUMMARY:STUDY OF REACTIONS WITH THE α-PARTICLE EMISSION AT Emax=20 MeV ON NATURAL ZIRCONIUM TARGETS DTSTART;VALUE=DATE-TIME:20220713T144000Z DTEND;VALUE=DATE-TIME:20220713T145000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-370@events.sinp.msu.ru DESCRIPTION:Speakers: Pavel Remizov (MSU)\nData of the cross sections and population yields of high-spin isomeric states in reactions with the emiss ion of charged particles makes it possible to obtain various information b oth on the structure of excited levels in the continuous and discrete exci tation regions and on the nuclear reaction mechanisms. Therefore\, the pre sent work aim is to study the 87\,91\,92Sr yields in reactions with bremss trahlung quanta for energies in the region of the giant dipole resonance o n zirconium isotopes.\nThe study of weighted average yields was carried ou t by the activation method by 20 MeV bremsstrahlung gamma quanta on target s of natural metallic zirconium.\nThe spectra of irradiated targets were m easured using Ortec and Canberra gamma spectrometers with a (15-40)% detec tion efficiency compared to a 3'×3'' NaI(Tl) detector. The energy resolut ion of the spectrometers was 1.8–2.0 keV at the 1332 keV 60Co gamma line .\nGamma transitions from the 87mSr and 91\,92Sr decays are reliably ident ified in the studied spectra. The weighted average yields of 87mSr and 92S r occupation in the (γ\, α)-reaction\, as well as 91Sr in the (γ\, αn) reaction\, were studied for the first time on natural zirconium for 20 Me V bremsstrahlung gamma quanta. The following weighted average yields were obtained: for 87mSr (Iπ=1/2–) Y=6.9±0.7 µb\, for 91Sr Y=14±3 µb\, for 92Sr Y=5.5±0.6 µb.\nThe dominance of non-statistical processes is st ated according to the simulation results within the TALYS 1.96 program cod e. The obtained results are discussed.\n\nhttps://events.sinp.msu.ru/event /8/contributions/370/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/370/ END:VEVENT BEGIN:VEVENT SUMMARY:Data on the np-scattering length from the nd-breakup reaction at l ow energies DTSTART;VALUE=DATE-TIME:20220715T151000Z DTEND;VALUE=DATE-TIME:20220715T153000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-374@events.sinp.msu.ru DESCRIPTION:Speakers: Aleksandr Kasparov (INR RAS)\nA kinematically comple te experiment to determine the $np$-scattering length in the $n + d → (n p) + n$ reaction on the neutron beam of the RADEX channel of the INR RAS w as carried out. In the experiment a recoil neutron as well as a neutron fr om the breakup of the $np$ system was registered. The primary neutron ener gy and the proton energy from the breakup of the $np$ system was reconstru cted from the known emission angles and energies of two neutrons and the f act that a breakup proton was detected in an active deuterated target. The experiment was carried out at low neutron energies $8 - 13$ MeV. The valu e of the $np$-scattering length was obtained by a comparison of the experi mental dependence of the $nd$-breakup reaction yield on the relative energ y of the $np$ pair with the simulation results. The obtained value of the $np$-scattering length differs significantly from the value obtained in di rect $np$-scattering and can be associated with a significant influence of $3N$-forces.\n\nhttps://events.sinp.msu.ru/event/8/contributions/374/ LOCATION: Физический ф-т\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/374/ END:VEVENT BEGIN:VEVENT SUMMARY:THE SPECIFIC FEATURES OF PHOTODISINTEGRATION OF 58\,60Ni DTSTART;VALUE=DATE-TIME:20220713T120000Z DTEND;VALUE=DATE-TIME:20220713T122000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-577@events.sinp.msu.ru DESCRIPTION:Speakers: Vladimir Varlamov (Lomonosov Moscow Statw University \, Skobeltsyn Institute of Nuclear Physics)\nThe reliability of experiment al cross sections of partial photoneutron reactions (g\,1n) and (g\,2n) fo r 58\,60Ni obtained using both bremsstrahlung [1-4] and quasimonoenergetic annihilation photons [5] were analyzed using the objective physical crite ria. The ratios of partial reaction cross sections to that of neutron yiel d reaction Fi = CS(g\,in)/CS(g\,xn) = CS(g\,in)/[CS(g\,1n) + 2CS(g\,2n)] w ere used. In the cases of (g\,1n) and (g\,2n) reactions reliable data rati os Fiexp must have values not higher than 1.00 and 0.50 [3] and near the v alues Fitheor calculated in the combined photonuclear reaction model (CPNR M) [6]. It was obtained that data under discussion [1-4] do not satisfy th ose criteria. The new reliable cross sections of partial reactions for bot h 58\,60Ni were evaluated using data [5] and experimental-theoretical meth od [7]: CSeval(g\,in) = Fitheor CSexp(g\,xn). It was found that the notice able differences between experimental and evaluated cross sections are bec ause of definite shortcomings of the neutron multiplicity sorting method u sed [5]. The main reason is that generally the CSexp(g\,2n) in reality in a large extent is the CS(g\,1n1p). The point is that in the case of 58Ni t he threshold B1n1p of the (g\,1n1p) reaction is 2.9 MeV smaller in compari son with B2n and the value of CS(g\,1n1p) is ~20 times larger in compariso n with CS(g\,2n). In the case of 60Ni the correspondent deviations are som ewhat less but also very large. The role of (g\,1n1p) reaction in the case s of relatively light nuclei is very specific. The sharing of investigated nucleus excitation energy between neutron and proton in the (g\,1n1p) rea ction is (at least could be) similar to that between two neutrons in the r eaction (g\,2n) and because of that energies of neutrons from both partial reactions could be near. But outgoing neutron from the reaction (g\,1n1p) has multiplicity equal to 1 but both neutrons from the reaction (g\,2n) h ave multiplicity equal to 2. Therefore the reaction (g\,2n) cross sections for both 58\,60Ni were obtained [5] with significant systematic uncertain ties and must not be recommended for using in research and applications.\n \n1. K. Min et al.\, Phys. Rev. Lett. 21\, 1200 (1968).\n2. D. G. Owen et al.\, Nucl. Phys. A 140\, 523 (1970).\n3. B. I. Goryachev et al.\, JETF Le tters 8\, 46 (1968).\n4. B. I. Goryachev et al.\, Sov. J. Nucl. Phys. 11\, 141 (1970).\n5. S. C. Fultz et al.\, Phys. Rev. 10\, 608 (1974).\n6. B. S . Ishkhanov et al.\, Phys. Atom. Nucl. 71\, 493 (2008).\n7. V. V. Varlamov et al.\, Bull. Rus. Acad. Sci. Phys. 74\, 833 (2010).\n\nhttps://events.s inp.msu.ru/event/8/contributions/577/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/577/ END:VEVENT BEGIN:VEVENT SUMMARY:PARTIAL PHOTONUCLEAR REACTION CROSS SECTIONS OBTAINED USING BREMSS TRAHLUNG DTSTART;VALUE=DATE-TIME:20220713T122000Z DTEND;VALUE=DATE-TIME:20220713T122500Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-447@events.sinp.msu.ru DESCRIPTION:Speakers: Vladimir Varlamov (Lomonosov Moscow State University \, Skobeltsyn Institute of Nuclear Physics)\nCross sections of partial rea ctions\, primarily (g\,1n) and (g\,2n\, are widely used in both scientific researches and applications. There are two main methods for obtaining tho se in various experiments. The majority of CS(g\,1n) and CS(g\,2n) for was obtained using quasimonoenergetic annihilation photons [1\,2] in Livermor e (USA) and Saclay (France). The method of photoneutron multiplicity sorti ng using measured neutron energy was used for direct measurement the cross sections CS(g\,1n) and CS(g\,2n). For 19 nuclei from 51V to 209Bi investi gated in both laboratories significant systematic disagreements were found [3\,4]. Using the objective physical criteria of data reliability it was shown that in general partial reaction cross sections obtained using the m ethod of neutron multiplicity sorting are not reliable because the presenc e of significant systematic uncertainties from the unreliable (erroneous) identification of multiplicity of detected neutron [5]. The most important criteria are that positive ratios Fiexp = CS(g\,in)/CS(g\,xn) = CS(g\,in) /[CS(g\,1n)+2CS(g\,2n)] for reliable data in the cases of (g\,1n) and (g\, 2n) reactions must have values not higher than 1.00 and 0.50 and near the values Fitheor calculated in the combined photonuclear reaction model (CPN RM). Data on partial reaction cross sections were obtained also using brem sstrahlung. The neutron yield cross sections CS(g\,xn) = CS(g\,1n)+2CS(g\, 2n) were measured directly and used for determination of CS(g\,2n) using t he corrections based on the nuclear reaction statistical theory. After tha t CS(g\,1n) was obtained using the correspondent subtraction procedure CS( g\,1n) = CS(g\,xn)-2CS(g\,2n). The reliability of partial reaction cross s ections CS(g\,1n) and CS(g\,2n) for nuclei 59Co\, 58\,60Ni\, 90Zr\, 112\,1 14\,119Sn\, 127I\, 165Ho\, 166Er\, 181Ta was investigated using the criter ia mentioned above. It was found that generally those cross sections are n ot reliable because of many physically forbidden negative values or values for which F2exp > 0.50. This is the results of some shortcomings in GDR s tatistical theory description of competition between particle reactions.\n \n1. S. S. Dietrich et al.\, At. Data Nucl. Data Tables 38\, 199 (1988).\n 2. IAEA Nuclear Data Section database\, Experimental Nuclear Reaction Data (EXFOR)”\, http://www-nds.iaea.org/exfor\;\nUSA National Nuclear Data C enter database\, CSISRS and EXFOR Nuclear reaction experimental data”\, http://www.nndc.bnl.gov/exfor/exfor00.htm.\nCDFE Nuclear Reaction Database (EXFOR)”\, http://cdfe.sinp.msu.ru/exfor/index.php.\n3. E. Wolynec et a l.\, Phys.Rev. C 29\, 1137 (1984).\n4. V. V. Varlamov et al.\, Internation al Nuclear Data Committee\, INDC(CCP)-440\, IAEA NDS\, Vienna\, Austria\, 2004\, p. 37.\n5. V. V. Varlamov et al.\, Phys. Atom. Nucl.\, 80\, 957 (20 17).\n\nhttps://events.sinp.msu.ru/event/8/contributions/447/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/447/ END:VEVENT BEGIN:VEVENT SUMMARY:ESTIMATİON OF THE REACTION CROSS SECTION Li(n\,α)T DTSTART;VALUE=DATE-TIME:20220712T143000Z DTEND;VALUE=DATE-TIME:20220712T145000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-383@events.sinp.msu.ru DESCRIPTION:Speakers: Bakhtiyar Najafov (Institute of Radiation Problems o f Azerbaijan National Academy of Sciences )\nThe presented work is carried out analyzes and evaluation of available experimental data on the Li(n\, α)T reaction cross section in order to obtain the recommended data. The r eaction cross section Li(n\,α)T--σnα (En) in neutron physics is often u sed as a reference quantity. In the neutron energy range En from 0.025 eV to 100 keV\, the cross section is known with an accuracy of 1÷3%. In the energy range 500 KeV\n\nhttps://events.sinp.msu.ru/event/8/contributions/3 83/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/383/ END:VEVENT BEGIN:VEVENT SUMMARY:MODELLING OF THE CLUSTER FORMATION IN HEAVY NUCLEI FISSION DTSTART;VALUE=DATE-TIME:20220712T082000Z DTEND;VALUE=DATE-TIME:20220712T084000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-387@events.sinp.msu.ru DESCRIPTION:Speakers: Anna Unzhakova (Saint Petersburg State University)\n This paper presents a study on the microscopical modelling of the cluster formation in the cold fission of actinides. \n In the last three decades \, the situation in experimental and theoretical investigation of clusteri ng effects in multimodal fission has changed dramatically [1\,2\,3].\n Bas ed on our cold fission multi-valley calculations in the framework of Strut insky shell correction method\, a theoretical study of various cluster str uctures emerging in the process of fission has been carried out. Results have demonstrated the effect of the arrangement and rearrangement of magic clusters in the fission process [4\,5].\nThis type of the cluster formati on modelling has been successfully implemented for the flow turbulence con trol using air pressure sensors and aircraft wing surface modifying actuat ors [6]. For the first time a new approach to the emergent cluster aggrega tion by the local rules of interaction has been proposed in highly-cited w ork of Vicsek et al. [7].\n Our computable microscopical modelling of t he clustering can contribute to understanding of the fission process dyna mical features such as a time scale\, an interplay between collective and single-particle degrees of freedom and a degree of equilibration on the fi ssion path.\n\n1. Y. Pyatkov and D. Kamanin\, J. Phys.: Conf. Ser. 1390 01 2011 (2019).\n2. W. Oertzen and A. Nasirov\, The European Physical Journal A. 56 (2020).\n3. D. Rodkin\, Yu.Tchuvil'sky\, JETP Letters\, 109:7\, 425 –431 (2019).\n4. A. Unzhakova and O. Granichin\, Exotic Nuclei: Proceedi ngs\, 351-354 (2020).\n5. A. Unzhakova\, T. Khantuleva\, and O. Granichin \, Fission and Properties of Neutron-Rich Nuclei: Proceedings\, 582-589 (2 018).\n6. O. Granichin\, T. Khantuleva\, and N. Amelina\, Proceedings I FAC\, 1940 (2017).\n7. T. Vicsek\, A. Czirók\, E. Ben-Jacob\, I. Cohen\, and O. Shochet\, Phys. Rev. Lett. 75\, 1226 (1995).\n\nhttps://events.sinp .msu.ru/event/8/contributions/387/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/387/ END:VEVENT BEGIN:VEVENT SUMMARY:MEASUREMENT OF THE NEUTRON YIELD FROM 13C(α\,n0)16O REACTION DTSTART;VALUE=DATE-TIME:20220714T152900Z DTEND;VALUE=DATE-TIME:20220714T154900Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-389@events.sinp.msu.ru DESCRIPTION:Speakers: Pavel Prusachenko (Institute for Physics and Power E ngineering\, Obninsk\, Russia)\nThe 13C(α\,n)16O reaction is important fo r some application including neutrino measurements\, nuclear astrophysics and nuclear power industry. The measurement of the total neutron yields (T NY) from this reaction has a high priority [1] because this data are used for normalization and testing the experimental data and the cross-section evaluations. The existing sets of experimental data on TNY were measured w ith uncertainty >10% due to the uncertainty of the 13C content in natural graphite. \n The goal of the work is the independent check and normalizati on of the 13C(α\,n0)16O reaction cross-section data measured in 2021 [2]. The differential spectra of neutrons and the total neutron yields from th e 13C(α\,n0)16O reaction were measured in the energy range 3-6.5 MeV usin g the thick carbon target enriched in 13C. The time-of-flight method was u sed to determine the neutron energy and to separate the neutrons correspon ding to ground state of the residual nucleus. The 13C enrichment and the e lemental composition of the target were determined using the ion beam anal ysis methods. The obtained TNY values were compared with ones calculated b ased on the ENDF/B-VIII.0 evaluation. \n\n1. S. S. Westerdale\, A. Jung hans\, R. J. deBoer\, M. Pigni\, P. Dimitrou\, Summary Report of the Virtu al Technical Meeting on (alpha\,n) Nuclear Data Evaluation and Data Needs\ , 8-12 November 2021 (INDC(NDS)-0836)\, printed by the IAEA in Austria\, M arch 2022.\n2. P. S. Prusachenko\, T. L. Bobrovsky\, I. P. Bondarenko\, M. V. Bokhovko\, A. F. Gurbich and V. V. Ketlerov\, Physical Review C\, 105 (2022) 024612.\n\nhttps://events.sinp.msu.ru/event/8/contributions/389/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/389/ END:VEVENT BEGIN:VEVENT SUMMARY:PROTON INDUCES PROCESSES ON STRONTIUM ISOTOPES DTSTART;VALUE=DATE-TIME:20220712T145000Z DTEND;VALUE=DATE-TIME:20220712T151000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-388@events.sinp.msu.ru DESCRIPTION:Speakers: Cristiana Oprea (Frank Laboratory of Neutron Physics \, Joint Institute for Nuclear Research\, Dubna\, MO\, Russian Federation) \nIn this study\, proton capture and (p\,xn) nuclear reactions on natural isotopes of Sr were investigated at incident protons up to 30-35 MeV. Taki ng into account all nuclear reaction mechanisms\, cross sections\, angular distributions\, and isotope productions have been analyzed. A Hauser-Fesh bach formalism was employed to describe compound processes\, an approximat ion of Distorted Wave Born Approximation for direct mechanisms\, and an ex citon model to explain pre-equilibrium processes [1-3]. In this study\, th e contribution of the nuclear reactions mechanisms to the cross sections a nd angular distributions is discussed. These theoretical evaluations were compared with experimental data from literature and with those obtained fr om FLNP JINR Dubna facilities. Experimental data of fast proton-induced re actions are consistent with theoretical results. Based on the good agreeme nt between theoretical and experimental results\, it was possible to deriv e the dependence of the isomer ratios on the protons' energy. Several calc ulations use isotope ratios to evaluate spin distributions of reaction pro ducts\, densities of nuclear states\, and nuclear deformation in final sta tes. Computer simulations were conducted to evaluate the production of Ytt rium\, Rubidium\, and other isotopes using angular distributions of incide nt protons for different targets and intensities of incident protons. Calc ulations for isotopes and isomer production were compared with experimenta l data gathered from the literature.\nFor future experiments at JINR's Dub na facilities involving fast neutron induced reactions\, the present data will be used.\n\n1. W. Hauser\, H. Feshbach\, Phys. Rev\, 87\, 366 (1952). \n2. N. Austern\, Direct Nuclear Reaction Theories\, New-York\, Willey-Int erscience (1970).\n3. A.J. Koning\, J.M. Akermans\, Phys. Lett. B\, 234\, 417 (1990).\n\nhttps://events.sinp.msu.ru/event/8/contributions/388/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/388/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the reactions with light nuclei by AMBER experiment at CERN DTSTART;VALUE=DATE-TIME:20220715T074000Z DTEND;VALUE=DATE-TIME:20220715T080000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-412@events.sinp.msu.ru DESCRIPTION:Speakers: Alexey Dzyuba (NRC Kurchatov Institute PNPI (RU))\nT he recently approved NA66/AMBER experiment (Apparatus for Meson and Baryon Experimental Research) at the CERN Super Proton Synchrotron pursues a bro ad research program. An essential part of the program is a measurement of the antiproton production cross section in proton-helium collisions\, whic h will provide much needed input for the searches of Dark Matter. This\, a s well as other proposed experimental studies to address the various aspec ts of the so-called Emergence of Hadron Mass mechanism: the proton and mes ons charge radii\, the mesonic parton momentum distributions\, will be dis cussed.\n\nhttps://events.sinp.msu.ru/event/8/contributions/412/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/412/ END:VEVENT BEGIN:VEVENT SUMMARY:ASYMMETRY EFFECTS MODELLING IN SLOW NEUTRONS INDUCED PROCESSES ON 35CL NUCLEUS DTSTART;VALUE=DATE-TIME:20220712T141000Z DTEND;VALUE=DATE-TIME:20220712T143000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-394@events.sinp.msu.ru DESCRIPTION:Speakers: Alexandru Ioan Oprea (Frank Laboratory of Neutron Ph ysics\, Joint Institute for Nuclear Research\, Dubna\, MO\, Russian Federa tion)\nAsymmetry and spatial parity non-conserving effects were investigat ed in slow neutrons induced processes on 35Cl nucleus. Forward — backwar d\, left — right and parity non conservation effects were evaluated in t he (n\,p) reaction for neutrons energy up to 1 keV. Cross sections\, neces sary angular correlations\, asymmetry and spatial parity breaking effects were evaluated in the frame mixing parity of compound nucleus states with the same spin and opposite parities [1\,2]. Theoretical evaluations of the effects were compared with experimental data obtained at FLNP JINR Dubna and Peterburg Nuclear Physics Institute [3\,4]. Forward — backward\, lef t — right and parity non conservation effects are important because usin g theoretical evaluations and experimental results\, matrix element of wea k non leptonic interaction can be obtained [4]. \nFor each investigated ef fect\, angular correlations were obtained using (n\,p) reaction amplitudes from [1\,2]. Further\, applying direct Monte-Carlo method theoretical exp ressions and numerical evaluation of protons angular distributions were ob tained considering different possible terms in angular correlations. Using protons angular distribution\, computer simulation of the asymmetry and p arity breaking effects were realized considering targets with finite dimen sions and different densities. For each analyzed effect. precision of the experiment was determined and from computer modeled asymmetry coeffcients weak matrix elements was extracted.\nThe present results will be applied i n the investigations of new experiments proposed at intense neutrons sourc e IREN\, from FLNP JINR Dubna dedicated for the measurements of asymmetry effects in the 35Cl(n\,p)35S nuclear reaction with slow neutrons.\n\n1. V. E. Bunakov\, L.B. Pikelner\, Progess in Particle and Nuclear Physics\, 39\ , 337 (1997).\n2. V.V. Flambaum\, G.F. Gribakin\, Progess in Particle and Nuclear Physics\, 35\, 423 (1995).\n3. A. Antonov\, V.A. Vesna\, Y.M. Gled enov\, Soviet Journal of Nuclear Physics\, 48(2)\, 193 (1988).\n4. A.I. Op rea\, C. Oprea\, Yu.M. Gledenov\, P.V. Sedyshev\, C. Pirvutoiu\, D. Vladoi u\, Romanian Reports in Physics\, 63(2)\, 357 (2011)\n\nhttps://events.sin p.msu.ru/event/8/contributions/394/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/394/ END:VEVENT BEGIN:VEVENT SUMMARY:Prompt fission neutrons investigation at IREN in resonance neutron energy range DTSTART;VALUE=DATE-TIME:20220712T122000Z DTEND;VALUE=DATE-TIME:20220712T124000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-293@events.sinp.msu.ru DESCRIPTION:Speakers: Shakir Zeynalov (JINR)\nSh. Zeynalov\, O. Sidorova1\ nJoint Institute for Nuclear Research\, 141980\, Dubna Moscow region Russi a\n1Dubna State University\n\nInvestigations of prompt fission neutron emi ssion are of importance in understanding the fission process in general an d the sharing of excitation energy among the fission fragments in particul ar. Experimental activities at JINR on prompt fission neutron (PFN) emissi on are underway for more than 20 year. Main focus lies on investigations o f prompt neutron emission from the reactions 252Cf (sf) and 235U(n\,f) car ried out in JINR and EC-JRC-IRMM in the region of the resolved resonances. For the last reaction strong fluctuations of fission fragment mass and th e mean total kinetic energy distributions have been observed as a function of incident neutron energy [1\, 2]. In addition fluctuations of prompt ne utron multiplicities were also observed [3]. The goal of the present study is to verify the current knowledge of prompt neutron multiplicity fluctua tions and to study correlations with fission fragment properties. Recent m easurement of PFN multiplicity in resonance neutron induced fission of 235 U(n\,f) reaction reveal surprising result\, stimulated us to investigate t he PFN multiplicity at IREN with new high efficiency experimental setup.\ n\nReferences\n1. Zeinalov Sh.S.\, Florek M.\, Furman W.I.\, Kriatchkov V. A.\, Zamyatnin Yu. S.\, Neutron energy dependence of 235U(n\,f) mass and T KE distributions around 8.77 eV resonance VII International Seminar on Int eraction of Neutrons with Nuclear – Dubna: JINR\, -1999. -E3-1999-212. –P. 258-262.\n2. F.-J. Hambsch\, H.-H. Knitter\, C. Budtz-Jorgensen\, an d J.P. Theobald\, Fission mode fluctuation in the resonances of 235U(n\,f) \, Nuclear Physics A -1989. -Vol. 491. –P. 56 – 90.\n3. R.E. Howe\, T .W. Phillips\, C.D. Bowman\, Phys. Rev. C 13\, 195 (1976)\n\nhttps://event s.sinp.msu.ru/event/8/contributions/293/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/293/ END:VEVENT BEGIN:VEVENT SUMMARY:LOW ENERGY INCOMPLETE FUSION REACTIONS: PROBING OF ENTRANCE CHANEE L EFFECTS DTSTART;VALUE=DATE-TIME:20220715T120000Z DTEND;VALUE=DATE-TIME:20220715T122000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-398@events.sinp.msu.ru DESCRIPTION:Speakers: ANUJ KUMAR JASHWAL (BAREILLY COLLEGE\, BAREILLY)\nDu ring last couple of years\, the probability of incomplete fusion in heavy ion induced reactions for both strongly bound and loosely bound projectile s has been observed at energies as low as 4 – 5 MeV/A [1 – 4]. The HI induced reactions are important in basic research for the fundamental unde rstanding of reaction mechanism and to test the validity of various parame ters existing in available nuclear reaction models [5 – 7]. The importan ce of measured cross-section data has been found in applied research\, mor e particularly\, in reactor technology for nuclear energy generation and w aste management. Although the dynamics of the multiplicity of processes li ke complete fusion (CF)\, incomplete fusion (ICF)\, and pre-compound (PCN) emission in heavy ion (HI) interactions at low projectile energies depend on various entrance channel parameters\, moreover the projectile energy a nd angular momentum of the compound nucleus systems are some of the key pa rameters\, which play significant role in the characterization of such pro cesses in HI reactions. The entrance channel mass asymmetry\, alpha Q-valu e\, neutron thickness\, coulomb factor (ZpZt) and target deformation are s ome important entrance channel parameters\, that affects the probability o f incomplete fusion in heavy ion reactions. In the present work an attempt has been made to have an exclusive study on aforementioned entrance chann el parameters on 12C\, 13C\, 16O\, 18 O and 14N induced reactions with var ious target systems. It is observed that proper account of these entrance channel parameters is very much essential to conclusively explain the inco mplete fusion reactions. \n\n1. K. Kumar\, T. Ahmad\, S. Ali\, I. A. Rizvi \, A. Agarwal\, R. Kumar\, and A. K. Chaubey\, Phys. Rev. C 89\, 054614(20 14).\n2. S. Mukherjee\, A. Sharma\, S. Sodaye\, A. Goswami\, and B. S. Tom ar\, Int. J. Mod. Phys. E 15\, 237 (2006). \n3. Z. T. Dai\, D. Q. Fang\, Y . G. Ma\, X. G. Cao\, G. Q. Zhang\, and W. Q. Shen\, Phys. Rev. C 91\, 034 618 (2015).\n4. A. Agarwal et al.\, Phys. Rev. C 105\, 034609 (2022). M. Goeppert-Mayer\, Phys. Rev. 78\, 16 (1950).\n5. M. Crippa\, E. Gadioli\, P . Vergani\, G. Ciavola\, C. Marchetta and M. Bonardi\, Z. Phys. A 350 (199 4) 121.\n6. M. Cavinato\, E. Fabrici\, E. Gadioli\, E. Gadioli Erba\, P. V ergani\, M. Crippa\, G. Colombo\, I. Redaelli and M. Ripamonti\, Phys. Re v. C 52 (1995) 2577.\n7. D. J. Parker\, J. Asher\, T. W. Conlon and I. M. Naqib\, Phys. Rev. C 30 (1984) 143.\n\nhttps://events.sinp.msu.ru/event/8 /contributions/398/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/398/ END:VEVENT BEGIN:VEVENT SUMMARY:VELOCITY DISTRIBUTIONS OF PROJECTILE-LIKE FRAGMENTS IN FRAGMENTATI ON REACTIONS AT FERMI ENERGIES DTSTART;VALUE=DATE-TIME:20220712T074000Z DTEND;VALUE=DATE-TIME:20220712T080000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-364@events.sinp.msu.ru DESCRIPTION:Speakers: Tatiana Mikhailova (JINR)\nVELOCITY DISTRIBUTIONS OF PROJECTILE-LIKE FRAGMENTS IN FRAGMENTATION\n REACTIONS AT FERMI ENERGIES\ n\nT. I. Mikhailova1\, B. Erdemchimeg1\,2\, Yu. M. Sereda1\n1Joint Institu te for Nuclear research\, Dubna\, Russia\;\n 2 National University of Mong olia\, NRC\, Ulaanbааtar\, Mongolia\n E-mail: tmikh@jinr.ru \n\nFragment ation reactions at Fermi energies are studied for decades since 1970th. Th ey are of interest because in these reactions nuclei far from stability li ne are produced. The properties of these exotic nuclei can shed light on b etter understanding the nature of nuclear forces. The striking feature of heavy-ion induced fragmentation reactions is that the velocities of projec tile-like fragments are peaked at projectile velocity. This would be natur al for the reactions at relativistic energies in which direct processes pr evail\, but not so evident at lower ones which have dissipative nature. It is therefore of interest to understand in detail the production mechanism of these fragments. In these report we analyze velocity distributions of forward emitted fragments for several reactions on Be and Ta targets at en ergies in the vicinity of Fermi energy in terms of microscopic approach [1 ]. We also deduce the ratio of direct and dissipative components [2] as a function of mass fragment and study its dependence on the projectile energ y and other characteristics of the reaction. This can be helpful in planni ng future experiments with radioactive beams. \n\n\n1 T. I. Mikhailova et al.\, EPJ Web of Conferences. 173. 04010 (2017).\n2 B. Erdemchimeg et al. \, Bulletin of RAS: Physics. 85. 1457. (2021).\n\nhttps://events.sinp.msu. ru/event/8/contributions/364/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/364/ END:VEVENT BEGIN:VEVENT SUMMARY:Studies of excited states of 9Be in the region of 11-13 MeV excita tion DTSTART;VALUE=DATE-TIME:20220715T141000Z DTEND;VALUE=DATE-TIME:20220715T143000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-327@events.sinp.msu.ru DESCRIPTION:Speakers: Viktar Starastsin (National Research Center «Kurcha tov Institute»)\nThe angular distributions for the 11.28 MeV\, 11.82 MeV and 13.79 MeV states are obtained from the experiment on the scattering of alpha particles with energies of 30 and 90 MeV. The analysis of the obtai ned data was carried out using the DWBA model\, which made it possible to determine the values of the spin-parity of the states under study. Determi ning the value of the spin-parities made it possible to assign these level s to the corresponding bands in the $^9$Be nucleus.\n\nhttps://events.sinp .msu.ru/event/8/contributions/327/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/327/ END:VEVENT BEGIN:VEVENT SUMMARY:Analysis of cluster radioactivity using Q-value dependent relative separation DTSTART;VALUE=DATE-TIME:20220712T151000Z DTEND;VALUE=DATE-TIME:20220712T153000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-209@events.sinp.msu.ru DESCRIPTION:Speakers: Chahat Jindal (Thapar Institute of Engineering and t echnology\,Patiala\,India)\, Nitin Sharma (School of Physics & Materials S cience\, Thapar Institute of Engineering and Technology\, India\, Patiala 147004\, India)\, Manoj Kumar Sharma (School of Physics & Materials Scien ce\, Thapar Institute of Engineering and Technology\, India\, Patiala 147 004\, India)\nThe spontaneous disintegration of an unstable nucleus to att ain a relatively stable configuration is known as radioactivity. Generall y\, it is considered that the radioactive decay happens via emission of th e alpha particle\, beta particle and gamma radiation. Apart from this\, cl uster radioactivity (CR)\, heavy particle radioactivity (HPR) and spontane ous fission (SF) are also probable ground state emission modes. The sponta neous splitting of a unstable parent nucleus into fragment heavier than th e α-particle but lighter than the fission fragments is known as cluster r adioactivity (CR). It was theoretically predicted in [1]\, and then experi mental verification was done by Rose and Jones [2]\, where 14C was detecte d from 223Ra radioactive parent nucleus. In past few decades\, different e xperimental and theoretical attempts [3\,4] were made to explore the clust er radioactive emission modes. Numerous theoretical models are introduced to explore such complex decay mode on the basis of different nuclear prope rties (size\, shape\, magicity etc.).The preformed cluster model (PCM) is one such model [5] which is successfully employed to address the cluster r adioactivity and other competing ground state decay modes. PCM works out in terms of the mass asymmetry coordinate η and relative separation dista nce R. The preformation probability (η-motion) and the penetration probab ility (R-motion) are calculated at a fixed turning point Ra\, which is the sum of the relative separation at touching configuration and the neck len gth parameter “∆R”. In the present work\, we have estimated Q-value dependence of Ra \,which can be further utilize to calculate the decay hal f-lives and other decay properties of the radioactive nuclei. The work inc ludes the study of CR by taking spherical choice of the decaying fragments . It will be of further interest to extend this work to study the comparat ive analysis of cluster dynamics with other ground state channels such as alpha-decay\, hpr\,and sf etc.\n\nhttps://events.sinp.msu.ru/event/8/contr ibutions/209/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/209/ END:VEVENT BEGIN:VEVENT SUMMARY:PROMPT FISSION NEUTRON SPECTRA OF 235U AND 239PU DTSTART;VALUE=DATE-TIME:20220712T124000Z DTEND;VALUE=DATE-TIME:20220712T131000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-586@events.sinp.msu.ru DESCRIPTION:Speakers: Vladimir Maslov ()\nPre-fission neutrons influence t he observed prompt fission neutron spectra (PFNS)\, TKE\, average number o f prompt fission neutrons\, (n\,F) and (n\,xn) reaction cross sections. Th ough pre-fission neutrons in 235U(n\,F) were first observed around En~14 M eV [1] and then at En~7 MeV [2]\, only now measured data base [3-6] allows to demonstrate the complex influence of fissility of nuclides 236U and 2 40Pu on the PFNS shape. The model parameters are fixed at thermal neutron energy [7] and the renormalized for the TKE measured data.\n The PFNS shap es at En ~6-7 MeV are strongly correlated with nuclide fissilities in 235U (n\,xnf) and 239Pu(n\,xnf) reactions and competition of (n\,xnX) reactions . Calculated exclusive (n\,nγ)\, (n\,2n)1\,2 and (n\,nf)1 pre-fission neu trons spectra allow to demonstrate that the amplitude of (n\,nf) spectra i s the largest for 235U(n\,F) at En ~6.5 MeV (Fig.1) while for 239Pu(n\,F) at En ~6.0 MeV (Fig. 2). When (n\,nf) reaction competes only with (n\,nγ) reaction\, the pre-FNS shapes are rather similar (En ~ 5.5 MeV)\, though the contribution of (n\,nf)1 is much higher in case of 235U(n\,F) reaction . When the (n\,2n) reaction channel opens\, the pre-FNS shapes reveal dras tic influence of (n\,2n)1 and (n\,2n)2 neutron spectra. The fig. 1 demonst rates partials for 235U(n\, F) reaction\, the numerical data [8] are compa tible with data [4\,5]. The fig. 2 demonstrates partials for 239Pu(n\, F) reaction\, while the data [3-6] are compatible with predicted (n\,xnf) con tributions [9]. The lower curves and data points show the partitioning of the PFNS into the (n\, f)\, (n\,nf) and (n\,nf)1 contributions. \n1. Yu.A . Vasil’ev\, Yu.S. Zamyatnin et al.\, Soviet Physics JETP\, 11\, 483 (19 60).\n2. A. Bertin\, R. Bois\, J. Frehaut 3d All Union Conf.on Neutron Phy s.\,Kiev\,9-13 Jun 1975\, Vol.4\, p.303 (1975).\n3. P. Marini\, J. Taieb\, B. Laurent\, et al.\, Phys. Rev. C 101\, 044614 (2020).\n4. K.J. Kelly et al.\, Eur. Phys. Journ. Web of Conf.\, 2020\, v. 239\, 05010.\n5. K.J. K elly\, M. Devlin\, J.A. Gomez\, et al.\, LA-UR-18-30526\, 2018.\n6. K. J. Kelly\, M. Devlin J.M. O’Donnel et al\, Phys. Rev. C 102\, 034615(2020). \n7. V.M. Maslov\, N.A. Tetereva\, V.G. Pronyaev et al.\, Atomic Energy\, 108\, 432 (2010)\n8. V.M. Maslov\, N.V. Kornilov\, A.B. Kagalenko et al.\, Nucl. Phys. A 760\, 274 (2005)\, https://www-nds.iaea.org/minskact/data/9 2235f18.txt.\n9. V.M. Maslov\, Atomic Energy\, 103\, No. 2\, 633 (2007)\n\ nhttps://events.sinp.msu.ru/event/8/contributions/586/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/586/ END:VEVENT BEGIN:VEVENT SUMMARY:Cross-section measurement for the 7Li(p\,p’)7Li and 7Li(p\, )4He reaction DTSTART;VALUE=DATE-TIME:20220715T143000Z DTEND;VALUE=DATE-TIME:20220715T145000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-405@events.sinp.msu.ru DESCRIPTION:Speakers: D. Kasatov ()\nReliable data on the 7Li(p\,)4He a nd on 7Li(p\,p’γ)7Li reactions cross section are important for many app lications\, including fusion and accelerator neutron sources with a lithiu m target. The existing cross-section datasets in the literature are unfort unately inadequate and discrepant in many cases. Measurements of the react ions cross section were carried out at the accelerator-based neutron sourc e at the Budker Institute of Nuclear Physics (Novosibirsk\, Russia) using a NaI\, HPGe γ-ray and alpha spectrometers . The 7Li(p\,p’γ)7Li reacti on cross section and 478 keV photon yield from a thick lithium target at p roton energies from 0.65 MeV to 2.225 MeV have been measured with high acc uracy. The 7Li(p\,)4He reaction cross section is determined for proton energies E = 0.6-2 MeV. The experimental data are compared to the data fro m literature\, when available.\nPlans to measure the 11B(p\,) neu tronless fusion reaction cross section.\nThe report will describe the neut ron source VITA\, present and discuss the results obtained\, and declare p lans.\nThis research was supported by Russian Science Foundation\, grant N o. 19-72-30005.\n\nhttps://events.sinp.msu.ru/event/8/contributions/405/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/405/ END:VEVENT BEGIN:VEVENT SUMMARY:STUDY OF TAGGED NEUTRINO BEAM CHARACTERISTICS AT THE U-70 ACCELERA TOR DTSTART;VALUE=DATE-TIME:20220715T093000Z DTEND;VALUE=DATE-TIME:20220715T095000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-411@events.sinp.msu.ru DESCRIPTION:Speakers: A. A. Sokolov ()\nIn accelerator-based neutrino expe riments\, the momentum of an interacting neutrino is known with poor accur acy. The type of neutrino interacting in the detector is not known definit ely also. \nThese problems could be solved by using tagged neutrino beams. The idea of tagged neutrino beams is that\, simultaneously\, with the reg istration of neutrino interaction\, a special tagging station measures the momentum of the parent particle\, as well as the momenta of other charged particles from its decay. Based on the reconstruction of the π(K)± → µ± µ(µ) or Ke3 decays kinematics of parent particles from measured da ta it is possible to reconstruct the momentum and the type of a produced n eutrino with a high accuracy [1\, 2]. \nOne of the problems that arise whe n constructing of tagged neutrino beams is how to relate the neutrino inte raction to the corresponding parent particle decay. For this\, both tempor al and spatial referencing of events registered in the neutrino detector a nd in the tagging station detectors are used.\nIn this paper\, we describe a technique for the tagged neutrino production from π± → µ± µ(µ) decays at the U-70 (Protvino) accelerator channel. The calculated charact eristics of the channel for the formation of a beam of parent particles π ± are presented. Various options of the tagging station design are consid ered. The main characteristics of the obtained tagged neutrino beams are p resented.\n\n1. A. A. Boikov et al.\, Preprint IHEP 80-156 (1980).\n2. A. A. Boikov et al.\, Preprint IHEP 80-158 (1980).\n\nhttps://events.sinp.msu .ru/event/8/contributions/411/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/411/ END:VEVENT BEGIN:VEVENT SUMMARY:TO YIELD STUDIES FOR THE REACTIONS 13C(gamma\, p)\, 14N(gamma\, 2p )\, 14N(gamma\, 2n) WITH (12B\, 12N)- ACTIVITY MEASUREMENTS BY DeltaE- DET ECTOR TELESCOPES AT THE PULSED ELECTRON ACCELERATOR DTSTART;VALUE=DATE-TIME:20220713T122500Z DTEND;VALUE=DATE-TIME:20220713T124500Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-413@events.sinp.msu.ru DESCRIPTION:Speakers: Leonid Dzhilavyan (Institute for Nuclear Research of the Russian Academy of Sciences)\nStudies of yields for photonuclear reac tions with production of 12B((T½) = 20.2 ms) and 12N((T½) = 11.0 ms) are interesting both for development of models of nuclear reactions with nucl ei-products near the boundaries of stability to nucleon-emission\, and for detection of hidden explosives and drugs (see\, e.g.\, [1]) with (12B and 12N)- activity registration.\nIn [2\, 3]\, there were considered features of emission of gamma- quanta\, electrons and positrons from targets at de cays of produced in them (12B and 12N)- nuclei.\nIn [4] for the reactions 13C(gamma\, p)\, 14N(gamma\, 2p)\, 14N(gamma\, 2n)\, there was given analy sis of known experimental and model-calculated data (including our own one s calculated by means of the widely used models of nuclear reactions). It was shown that new yield measurements are necessary for these reactions be cause estimated discrepancies of data are on the level of 1–2 orders of magnitude. In [5]\, there were briefly considered variants of such measure ments with detecting (12B and 12N)- activities by scintillation gamma- spe ctrometers or telescopes of thin DeltaE- counters. The first variant with NaI- spectrometers was considered in [6].\nIn the present work we consider ed measuring of (12B and 12N)- activities at the pulsed electron accelerat or based on registration of emitted from the target electrons or positrons by rather thin telescopic plastic counters with usage of the controlled P MT power supply dividers for all these scintillation counters [7].\n\n 1. L.Z. Dzhilavyan. Phys. Part. Nucl. No 5\, 556 (2019).\n 2. S.S. Belyshev e t al.\, Bull. Russ. Acad. Sci.: Phys. 80\, P. 566 (2016).\n 3. S.S. Belysh ev et al.\, Bull. Russ. Acad. Sci.: Phys. 83\, P. 449 (2019).\n 4. O.I. Ac hakovskiy et al.\, Bull. Russ. Acad. Sci.: Phys. 80\, P. 572 (2016).\n 5. L.Z. Dzhilavyan. About yield measuring for the reactions 14N(gamma\, 2n)12 N and 14N(gamma\, 2p)12B. Poster Reports of the XIV International Seminar on Electromagnetic Interactions of Nuclei (EMIN – 2015\, October 5-8\, M oscow\, Russia). INR RAS\, Moscow\, 2016\, pp. 12–15.\n 6. S.S. Belyshev et al.\, Bull. Russ. Acad. Sci.: Phys. 86\, No. 4. P. 577 (2022) (in Russ ian)\n 7. L.Z. Dzhilavyan et al.\, Bull. Russ. Acad. Sci.: Phys. 83\, P. 4 74 (2019).\n\nhttps://events.sinp.msu.ru/event/8/contributions/413/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/413/ END:VEVENT BEGIN:VEVENT SUMMARY:Simulated and experimental characteristics of a gas-filled recoil separator DGFRS-II DTSTART;VALUE=DATE-TIME:20220712T101000Z DTEND;VALUE=DATE-TIME:20220712T103000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-436@events.sinp.msu.ru DESCRIPTION:Speakers: Dmitriy Solovyev (FLNR JINR)\nFor further physical a nd chemical studies of superheavy elements (SHEs)\, SHE Factory was constr ucted at FLNR JINR. The facility is based on a new DC-280 heavy-ion accele rator that can deliver 48Ca beams with a projected intensity of 6*1013 ion s per second. The first experimental setup of the SHE Factory is a gas-fil led recoil separator DGFRS-2 with a QvDhQhQvD magnet configuration. A mod el of the DGFRS-2 was created using a GEANT4 toolkit. The main methods of trajectory simulations of heavy ions in gaseous media are presented:\nForm ing of a compound nucleus in the target layer.\nEvaporation of several neu trons from an excited nucleus.\nModeling of multiple scattering of ERs in the target and other separator’s media (filling gas\, a Mylar window bet ween the separator and detector volumes\, pentane in the detector chamber) .\nCalculation of energy losses in the target and gaseous media.\nModeling of an ERs recharge process in gas.\nCalculation of recoil trajectory in t he magnetic fields of the separator.\n The calculated data agreed well wit h the experimental data generated in test experiments.\n\nhttps://events.s inp.msu.ru/event/8/contributions/436/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/436/ END:VEVENT BEGIN:VEVENT SUMMARY:ANALYSIS OF THE COMPOSITION OF ISOTOPES IN A SAMPLE OF HIGH-TEMPER ATURE SUPERCONDUCTORS (HTS) AFTER IRRADIATION IN THE RADIATION FIELD OF A LEAD CONVERTER WITH A PROTON BEAM (ЕР = 660 MeV) DTSTART;VALUE=DATE-TIME:20220715T151000Z DTEND;VALUE=DATE-TIME:20220715T153000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-661@events.sinp.msu.ru DESCRIPTION:Speakers: Vladimir Stegaylov (JINR)\nCombined talk\n\nANALYSIS OF THE COMPOSITION OF ISOTOPES IN A SAMPLE OF HIGH-TEMPERATURE SUPERCONDU CTORS (HTS) AFTER IRRADIATION IN THE RADIATION FIELD OF A LEAD CONVERTER\n WITH A PROTON BEAM (ЕР = 660 MeV)\n M.S. Novikov\, S.I. Tyutyunniko v\, G.V. Trubnikov\, V.I. Stegailov\, \nV.P.Volnykh\, T.N. Tran.\n JINR\, Dubna\, Russia\, E-mail: stegajlov2013@yandex.ru\, tntoan@io p.vast.vn\nThis report considers one of the stages of work on the developm ent of a series of superconducting magnets operating at temperatures up to 65 K for the possible creation on the basis of a series of accelerators: proton cyclotron (Phasotron) \, medical cyclotron (SC230 with HTS windin g\, 4kA\, 2-T) and etc.\n1. Novikov M.\, Khodzhibagiyan H.\, Tyutyunnikov S.\, Stegailov V.\, Smirnov G.\, Petrova M.\, Kondratiev B. Book of abstra cts and articles of Int. Conf. “Modern Problems of Nuclear Energetics an d Nuclear Technologies”. P. 111. Tashkent\, November (2021).\n\n IO N SOURCE FOR RESEARCH IN NUCLEAR PHYSICS\n V.P. Ovsyannikov1\, A .V. Nefedov2\, A.A. Levin3\, V.I. Stegailov1\, \n S.I. Tyutyunnikov1\, Y.A.Vaganov1\n1Joint Institute for Nucl ear Research\, 141980 Dubna\, Russia\; 2Petersburg Nuclear Physics Institu te\, 188300 Gatchina\, St. Petersburg\, Russia\; 3Ioffe Institute\, 194021 St. Petersburg\, \n E-mail: stegajlov2013@yand ex.ru\, vaganov_ya@jinr.ru\n An ionizer of the MaMFIS type (Main Magnetic Focus Ion Source) [1] produces ions with a high charge in local ion traps of a pulsating electron beam\, where the density can still reach extremely high values (~10 kA/cm2). X-ray radiation from Bi60+ ions was detected. T he peculiarity of the ionizer – a high ion charge and a relatively low n umber of ions\, makes it attractive for experiments with an ion Penning tr ap (MATS and LaSpec: High-precision experiments using ion traps and lasers at FAIR).\n1 . V.P. Ovsyannikov\, A.V. Nefiodov\, A.Yu. Boytsov\, A.Ya. R amsdorf\, V. I. Stegailov\, S.I. Tyutyunnikov\, A.А. Levin // Main magnet \, NIM\, 502 (2021) 23-28.\n\n 152Eu NUCLEUS IN THE FIELD OF LA SER RADIATION 1064nm\n E.V. Barmina1\, A.V. Simakin1\, S.I. Tyutyunn ikov2\, V.I. Stegailov2\, G.A. \n Shafeev1\,3\, I.A. Shcherbakov1\n1Prokhorov General Physics Institute of the Russian Academy of Sciences\, Moscow\, Russia\; 2 Joint Institute for Nuclear Research\, Dubna\, Russia\; 3National Research Nuclear University “MEPhI” \, Moscow\, Russia \nE-mail: stegajlov2013 @yandex.ru\n The experiments were carried out within the framework of the project «Energy and Transmutation of Radioactive Waste». The decay of n uclei under the action of laser radiation with a wavelength of 1064 nm on their aqueous solutions was studied. The well-studied 152Eu nucleus is of particular interest.\n1. E.V. Barmina\, S.I.Tyutyunnikov et al. Quantum El ectronics (2019)\, 49 (8):784.\n\nhttps://events.sinp.msu.ru/event/8/contr ibutions/661/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/661/ END:VEVENT BEGIN:VEVENT SUMMARY:ISOMERISM AND DECAY OF ODD-ODD NUCLEI 156\,158\,160Нo NEW ISOMER Т1/2 = (1.8 ± 0.2) min 156Нo DTSTART;VALUE=DATE-TIME:20220713T154000Z DTEND;VALUE=DATE-TIME:20220713T160000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-660@events.sinp.msu.ru DESCRIPTION:Speakers: Vladimir Stegaylov (JINR)\nCombined talk\n\n ISOMER ISM AND DECAY OF ODD-ODD NUCLEI 156\,158\,160Нo \n NEW ISOMER Т1/2 = (1.8 ± 0.2) min 156Нo \n S.I. Tyutyunnikov1\, V.I. Stegailov1\, V.G. Kalinnikov1S.V. Rozov1\, V.V. Kobets1\, \n S. A. Evseev1\, N.G. Shakun1\, T.N. Tran1\, Yu. A. Vaganov1\, V.P. Volnykh1.\ n A.A. Smirnov2\, A. G. Letov2\, R.L. Zinovyev1.\n1 Joint Institute for Nu clear Research\, Dubna\, Russia\, 2 Institute in Physical and Technical Pr oblems\, Dubna\, Moscow region\, Russia\nE-mail: stegajlov2013@yandex.ru\, vaganov_ya@jinr.ru\n The experiments were carried out within the “Ener gy + Transmutation” project with the 660 MeV protons of the Phasotron ac celerator at JINR.\nThe investigated neutron-deficient odd-odd 156Ho isoto pes were produced in deep spallation reactions using lead targets and 165H o monoisotope samples.\n1.V.G.Kalinnikov et al. // Int. conference on nucl ear physics «Nuclear shells - 50 years». Summaries of reports. 88. Dubna \, Russia\, 1999\n\nCOMPARISON OF THE YIELDS OF 238U FISSION PRODUCTS AFTE R IRRADIATION BY PROTONS (Ep = 660 MeV)\, NEUTRONS (En ≤ 660 MeV) AND EL ECTRONS (Ee = 140 MeV)\n S.I. Tyutyunnikov\, V.I. Stegailov\, S.V. Ro zov\, V.V. Kobets\, I.A. Kryachko\, \nS.A. Evseev\, N.G. Shakun\, T.N. Tra n\, R.L. Zinovyev \nJoint Institute for Nuclear Research\, Dubna\, Russia\ nE-mail: stegajlov2013@yandex.ru.\n The experiments were carried out at J INR accelerators: proton synchrocyclotron (Ep = 660 MeV) and linear electr on accelerator (Ee up to 200 MeV). Lead was used as a converter for the pr oton beam\, and bismuth was used as a converter for the electron beam [1]. \n1.S.I. Tyutyunnikov et al. // Int. Conf. 86-88\, Tashkent\, 23-25 Novem ber\, 2021.\n\nTARGET 209Bi ON AN ELECTRON BEAM AT ITS =180MeV\n S .I. Tyutyunnikov1\, V.I. Stegailov1\, V.V. Kobets1\, B.S. Yuldashev1\,\n F.A. Rasulova1\, S.V. Rozov1\, S.A. Evseev1\, T.N. Tran1\,2\, Yu.G. Te terev1\,\nA. R. Balabekyan1\, J. R. Drnoyan1\, I.A. Kryachko1.\n Joint In stitute for Nuclear Research\, Joliot-Curie 6\, Dubna\, Moscow region\, Ru ssia\, 141980 \n Institute of Physics\, Vietnam Academy of Scienc e and Technology\, Hanoi\, Vietnam\n E-m ail: stegajlov2013@yandex.ru\nExperiments within the framework of the Ener gy and Transmutation project [1] were carried out using the LINAK-200 acce lerator at JINR. 209Bi samples were irradiated in the field of electron br emsstrahlung with Ee =180 MeV. The possibility of studying the decay of sh ort-lived odd-odd nuclei cA=196-202 and obtaining their maximum yields was investigated [2].\n 1. S.I. Tyutyunnikov\, V.I Stegailov et al.\, //NUC LEUS-2020. St-Petersburg\,117-118 (20)\n 2. S.S. Belyshev et al.\, // E ur. Phys. J. A 51\, 67 (2015).\n\nhttps://events.sinp.msu.ru/event/8/contr ibutions/660/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/660/ END:VEVENT BEGIN:VEVENT SUMMARY:DIRECT REACTIONS AND SYNTHESIS OF COLD HEAVY NUCLEI DTSTART;VALUE=DATE-TIME:20220714T120000Z DTEND;VALUE=DATE-TIME:20220714T122000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-432@events.sinp.msu.ru DESCRIPTION:Speakers: Vadim Bunakov (Peterburg Nuclear Physics Institute ) \nThe cross-section of the superheavy element’s yields produced in col lision of heavy ions is extremely small. One of the main reasons for this smallness comes from the fact that the compound nucleus produced in this c ollision possesses the excitation energy which substantially exceeds its f ission barrier and therefore practically immediately performs fission into the two fragments. Moreover\, even the meager amount of the surviving sup erheavy elements immediately starts neutron evaporation and leaves the reg ion of the most stable superheavy isotopes.\n To minimize the influenc e of these processes one might use direct reactions of alpha-particle knoc k-on by the incident ion and heavy fragment stripping of this ion. In the se reactions a major part of the projectile is transferred to the target a nd forms a superheavy nucleus while alpha particle might carry away the ma jor part (sometimes practically all) of the system’s excitation energy. Very fast alpha-particles created in these processes were first observed b y the FNLR experimental group at JINR back in 1980-ies (see refs. in [1]) practically simultaneously with the theoretical explanation of their resul ts in terms of heavy particle stripping or knock-on reactions (see e.g. [2 ]). It was pointed that registration of alpha-particles with energy close to the kinematical two-body limit $E^{(2)}_{\\alpha\,lim}$ meant that th e new heavy nuclei with Z equal to the sum of the target $Z_T$ and project ile $Z_P$ charges minus 2 was created in the observed reaction. \n The se experiments are renewed now on the U-400 accelerator at FNLR. The use o f the new high resolution magnetic analyzer and detector system allows to measure light particles at the high-energy end of the spectrum whose yield is about $10^{-6}\\div10^{-8}$ of the yield at maximum. The experiments a re performed with the different sets of the projectiles and the targets. P ractically for all those sets alphas were observed close to the two-body l imiting energies $E^{(2)}_{\\alpha\,lim}$. However\, in all the cases of t he possible nuclei production with $Z=(Z_T+Z_P)≥99$ alpha-particles with energies exceeding $E^{(2)}_{\\alpha\,lim}$ were observed. A possibilit y is considered that this indicates a new type of the direct process which might be named “direct fission”. If the binary nuclear system created in the peripherical collision of the projectile and the target closely re sembles the excited heavy nucleus in the process of fission into two asymm etric fission projects\, then the emitted alpha-particle might also carry a part of the Q-energy produced in fission. \n\n1. V.I. Zagrebaev\, Yu.E. Penionzhkevich\, PEPAN 24\, 295 (1993).\n2. V.E. Bunakov\, V.I. Zagrebaev\ , Z. Phys. A 304\, 231 (1982).\n\nhttps://events.sinp.msu.ru/event/8/contr ibutions/432/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/432/ END:VEVENT BEGIN:VEVENT SUMMARY:ЗАХВАТ СОЛНЕЧНЫХ НЕЙТРИНО ЯДРАМИ МО ЛИБДЕНА 98 и 100 DTSTART;VALUE=DATE-TIME:20220715T080000Z DTEND;VALUE=DATE-TIME:20220715T082000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-435@events.sinp.msu.ru DESCRIPTION:Speakers: Алексей Осипенко (Националь ный исследовательский центр “Курчатовс кий Институт”\, Москва\, 123182\, Россия)\nПри расчете сечения взаимодействия нейтрин о с атомными ядрами σ(Eν) необходимо расс читывать структуру зарядово-обменной си ловой функции S(E) ядра\, которая имеет рез онансный характер. В докладе представле ны расчеты сечения захвата солнечных не йтрино σ(Eν) ядра-ми 98\,100Mo. В расчетах испо льзовались экспериментальные данные по силовой функции S(E)\, полученные в зарядо во-обменных реакциях (p\, n) [1] на 98Mo и (3He\, t) [2\, 3] на 100Mo. В рамках самосогласованной т еории конечных ферми-систем проведены р асчеты зарядово-обменной силовой функци и S(E) для этих ядер. Проанализирована рез онансная структура силовой функции S(E) и выделены Гамов-Теллеровский (GTR) [4]\, анал оговый (AR) [5] и пигми резонансы (PR) [6]. Иссл едовалось влияние резонансной структур ы S(E) на рассчитываемое сечение захвата с олнеч-ных нейтрино σ(Eν) и на скорость зах вата солнечных нейтрино R (число поглоще нных нейтрино за единицу времени). Показ ано\, что вклад GTR и PR в σ(Eν) и R для 98Mo суще ственный ~ 40%\, но для 100Mo этот вклад незна чительный из-за влияния солнечных нейтр ино малых энергий\, которых на порядки бо льше. Отмечено\, что захват солнечных ней трино ядром 100Mo является фоновым процесс ом при исследовании двойного бета-распа да этого ядра. \nРабота выполнена при ча стичной финансовой поддержке гранта Отд еления нейтринных процессов и внутренне го гранта НИЦ “Курчатовский институт” ( приказ № 2767 от 28.10.2021).\n\nhttps://events.sinp.msu.ru/even t/8/contributions/435/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/435/ END:VEVENT BEGIN:VEVENT SUMMARY:PHOTONUCLEAR REACTIONS: SOME POSSIBILITIES FOR METHODOLOGICAL IMPR OVEMENT DTSTART;VALUE=DATE-TIME:20220713T124500Z DTEND;VALUE=DATE-TIME:20220713T130500Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-437@events.sinp.msu.ru DESCRIPTION:Speakers: Miodrag Krmar (Faculty of Science\, University Novi Sad)\nCross sections for photonuclear reactions in the energy range of gia nt dipole resonance have often been measured. One of the most commonly use d experimental methods was the activation of a selected material in a high -energy bremsstrahlung beam. Considering that there is still a need for re liable results of cross-sectional measurements of photonuclear reactions\, this work will refer to some results aimed at improving the methodology i tself. \nInsufficiently precise knowledge of the energy spectrum and inten sity of the high energy photon beams has lead to the use of comparators\, ie. materials of well known activation properties. With a known geometry o f bremsstrahlung production\, it is possible to obtain a reliable energy d istribution of the emitted photon radiation using some simulation routine. In this case\, the photon beam can be calibrated by measuring the dose. B y the activation of the gold (for which the cross section for (γ\,n) reac tion is well known) and dosimetry measurements\, calibration of photon bea ms of Microtron 25\, in the energy interval from 5 MeV to 25 MeV was perfo rmed. Dosimetry measurements were done using calibrated ionization chamber intended for dosimetry control of photon beams of therapeutic linear acce lerators. \nReconstruction of cross-sections from photoactivation measurem ents has so far been performed using different numerical procedures. In re actor physics\, powerful computer algorisms have been developed to solve s imilar problems – to estimate the shape of the energy differential cross section based on neutron activation measurements. It has been shown [1] t hat a couple of such software packages can be successfully used in photoac tiovation measurements\, in the energy range up to 10 MeV. In this work\, a step further was done and mentioned software codes were tested on the ex ample of gold activation at energies up to 25 MeV. \n \n\n1. Z. Medić\, The European Physical Journal A 57\, 258 (2021)\n\nhttps://events.sinp.msu .ru/event/8/contributions/437/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/437/ END:VEVENT BEGIN:VEVENT SUMMARY:Diffuseness of nucleon density distribution and double-folding nuc leus-nucleus potential DTSTART;VALUE=DATE-TIME:20220714T130000Z DTEND;VALUE=DATE-TIME:20220714T132000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-450@events.sinp.msu.ru DESCRIPTION:Speakers: Makar Simonov (Lomonosov MSU\, Flerov Laboratory of Nuclear Reactions JINR)\nDescription of the internuclear interaction is th e one of the most important tasks in analysis of various nuclear reactions . In particular\, the position and height of the barrier determined by Cou lomb and nuclear interactions should be estimated in order to evaluate gen eral properties of fusion of heavy nuclei.\nThe calculations of fusion bar riers are carried out within the double-folding approach assuming the diab atic regime of collisions of heavy ions with $Z\, N > 9$. Nucleon density distributions are required to calculate the double-folding potential [1\, 2]. Thus\, radial parameters of nucleon densities given in the Fermi-distr ibution form are approximated on the basis of *rms* charge radii [3]. Acco rding to experimental data [4]\, diffuseness parameters of nucleon distrib utions are not clearly correlated with $Z\, N\, A$ of corresponding nucleu s and have significant uncertainties. Therefore\, the diffuseness values w ere fitted to reproduce the Bass barriers [5] for spherical nuclei (fig. 1 ). Potential barriers obtained in such a way can be used as estimation of fusion barriers in heavy ion reactions.\n\n![Fig. 1. Fit of the duffusenes s values obtained from comparison with the Bass barrier.][1]\n\n 1. V. Zag rebaev et al. (2007). Phys. Part. Nucl.\, 38\, 4\, 469 (2007).\n 2. M. V. Simonov\, A. V. Karpov\, T. Yu. Tretyakova\, Proceedings of LXXI Internat ional conference “Nucleus-2021”\, 307 (2021).\n 3. I. Angeli\, K. P. M arinova\, At. Data Nucl. Data Tables. 99\, 69 (2013).\n 4. H. De Vries\, C . W. De Jager\, C. De Vries\, At. Data Nucl. Data Tables. 36\, 495 (1987). \n 5. R. Bass\, Phys. Rev. Lett. 39\, 265\, (1977).\n\n\n [1]: https://dr ive.google.com/file/d/1wm71roEMdXpsRphmP6ZB_mMFgK3H7PFl/view?usp=sharing\n \nhttps://events.sinp.msu.ru/event/8/contributions/450/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/450/ END:VEVENT BEGIN:VEVENT SUMMARY:THE MSU SINP CDFE IN THE NUCLEAR REACTION DATA CENTRES NETWORK DTSTART;VALUE=DATE-TIME:20220714T144900Z DTEND;VALUE=DATE-TIME:20220714T150900Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-451@events.sinp.msu.ru DESCRIPTION:Speakers: Vladimir Varlamov (Lomonosov Moscow State University \, Skobeltsyn Institute of Nuclear Physics)\nAbout 50 years ago internatio nal community started the job in compilation\, computer processing and dis semination of nuclear data essential to the development and application of nuclear sciences and technologies. The scope of the IAEA Network of Nucle ar Reaction Data Centres (NRDC) includes nuclear data for both various app lications\, as well as for basic nuclear science. The important preparativ e and communication activities between 14 nuclear data centres from Austri a\, China\, France\, Hungary\, India\, Japan\, Korea\, France\, Russia\, U kraine\, USA are organized under the auspices o the IAEA. Each of the cent res provides coverage for different geographical zones and/or specific typ es of nuclear data\, thus together providing a complete service for users worldwide. 3 Russia centres participate now - Center of Nuclear Physics Da ta (CNPD)\, All Russian Scientific Research Institute of Experimental Phys ics\, Sarov\; Russian Nuclear Data Center (CJD)\, Institute of Physics and Power Engineering\, Obninsk\; Centre for Photonuclear Experiments Data (C entr Dannykh Fotoyadernykh Eksperimentov\, CDFE)\, Moscow State University Skobeltsyn Institute of Nuclear Physics\, Moscow. The NRDC Network coordi nated by the IAEA Nuclear Data Section successfully collaborates in the ma intenance and development of the digital EXFOR library\, the most comprehe nsive nuclear reaction data collection [1-3]. More than 20000 experimental studies of neutron\, charged-particle\, and photon induced reaction data are accumulated [4]. In addition to the EXFOR library many other nuclear d atabases (DB) convenient for using in scientific research and educational processes are available through Internet.\nThe MSU SINP CDFE is responsibl e for providing photonuclear data for various organizations in Russia\, pr imarily scientific and educational institutes and organization of Russian Academy of Science. All data are organized as relational DB on the CDFE We b-site (http://cdfe.sinp.msu.ru) [5] with powerful and flexible Search Eng ines. That gives to one the possibility for effective surfing the data nee ded for new nuclear reaction and nuclear structure physics researches.\n\n 1. IAEA Database “Experimental Nuclear Reaction Data (EXFOR)”\, http:/ /www-nds.iaea.org/exfor.\n2. USA National Nuclear Data Center Database “ Nuclear reaction experimental data EXFOR”\, http://www.nndc.bnl.gov/exfo r/exfor00.htm.\n3. CDFE “Nuclear Reaction Database (EXFOR)”\, http://c dfe.sinp.msu.ru/exfor/index.php.\n4. N. Otuka et al.\, Nucl. Dat. Sheets 1 20\, 272 (2014).\n5. S. Yu.Komarov et al.\, Program and Abstracts of Inter national Conference on Nuclear Data for Science and Technology\, New York\ , USA\, 04 – 08 March 2013. p. 253.\n\nhttps://events.sinp.msu.ru/event/ 8/contributions/451/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/451/ END:VEVENT BEGIN:VEVENT SUMMARY:Muon Capture on the Deuteron. The MuSun Experiment DTSTART;VALUE=DATE-TIME:20220715T142900Z DTEND;VALUE=DATE-TIME:20220715T144900Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-462@events.sinp.msu.ru DESCRIPTION:Speakers: N.I. Voropaev (Petersburg Nuclear Physics Institute named by B.P.Konstantinov of NRC «Kurchatov Institute»)\nThis article pr esent the result of the MuSun experiment\, precise measurement of muon cap ture rate by deuteron (Ld). The rate of the reaction µd(F=1/2)→vµ+n+ n is measured with precision 1%. That accuracy makes it possible to fix the low-energy constant (LEC) in an effective EFT field theory in a model-ind ependent way. After that this makes it possible to reliably calculate the cross sections of weak reactions in two−nucleon processes\, for example\ , such as pp synthesis going to the sun p+p→d+e+ve or neutrino scatterin g on deuteron ve+d→p+p+e-.\nThe experiment performed on a muon beam of t he Swiss Meson Factory (Paule Scherrer Institute\, PSI). The experimental technique is based on measuring the rate of muon loss in deuterium by regi stration Michel electrons. The basis of the setup was a time-projection ch amber (TPC)\, an active target filled with deuterium. Decay electrons were detected with a geometric efficiency of 70% by two external cylindrical p roportional chambers and scintillation counters. The measurements were car ried out at a deuterium temperature of 31 K and a pressure of 5 bar. For a dditional isotopic purification of deuterium\, a cryogenic separation was used\, which allows to reduce the concentration by protium to the level of 10-4. In this case\, the correction of Ld associated with the pd synthesi s is less than 1 Hz. To reduce the amount of heavy elements in deuterium\, a cryogenic circulating purification system was developed. This allow to reduce the presence of impurities in deuterium to 0.5•10-9. Measurement of such a low concentration of impurities was carried out by chromatograph ic method with cryogenic concentration. In order to reliably determine the Ld correction associated with muon capture on impurities\, which is 99% n itrogen\, an additional experiment was carried out on a muon beam with the addition of 2•10-6 nitrogen. As a result\, the muon transfer rate to ni trogen LdN= 2.2(1)•1011 Hz was measured and corresponding correction to Ld was determined as 1.5 Hz.\nAt the end of MuSun experiment 1.2•1010 us eful events were collected\, events with the muon stopping in the sensitiv e area of the TPC with registration of the decay electron. The statistical error of the measurement is 4 Hz. The main systematic correction to the µd capture rate connects with muon losses in the dd fusion reaction µdd →3Heµ+n. It is reliably calculated as 8.0(1)Hz.\n\nhttps://events.sinp. msu.ru/event/8/contributions/462/ LOCATION: Физический ф-т\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/462/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of muon catalyzed 3Hed Fusion DTSTART;VALUE=DATE-TIME:20220712T123000Z DTEND;VALUE=DATE-TIME:20220712T125000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-468@events.sinp.msu.ru DESCRIPTION:Speakers: I. Solovyev (NRC Kurchatov Institute PNPI)\nThe ther monuclear reaction $d({}^3\\!He\,\\alpha)p$ is a very rich playground to s tudy various phenomena in different fields of science. Astrophysicists use data of the cross section to build and tune a theory of primordial nucleo synthesis. Most nuclear reactions data doesn’t contain energy dependenci es below several keV\, the most interesting region for astrophysics.\nFrom a practical point of view\, the reaction is extremely efficient in energy generation. While producing 18.3 MeV worth of energy\, one of the highest energy outputs among nuclear reactions\, it doesn’t contain nor produce radioactive elements. It makes possible the construction of the safest an d efficient thermonuclear reactor.\nThe use of muons expands studies even more. It makes possible to investigate the reaction at extremely low energ y (several eV) that has never been done before. Bombarding a gas mixture o f $^3\\!He$ and $D_2$ ($H\\!D$) with energetic muons results in the format ion of exotic muonic molecules such as $^3\\!He\\mu d$. It was theoretical ly shown [1] that $^3\\!Hed$ fusion can occur in this formation.\nThe expe riment\, aimed to investigate muon catalyzed $^3\\!Hed$ fusion\, is being carried out at PSI (Switzerland) by the PNPI group (Gatchina\, Russia). It enables the study of processes involving mesomolecules.\nThe experimental setup\, adopted from the previous experiment MuSun [2]\, includes the cry ogenic TPC\, muon beam detectors\, kicker and detection system of electron s coming from muon decays. The kicker allows muons to enter the fiducial v olume only one by one. The data collected enables to determine a muon stop position\, detect tracks of electrons created via the muon decay as well as tracks of fusion products. Information about the energy of each particl e is also obtained.\nThe formation rates of the $d\\mu d$ and $^3\\!He\\mu d$ molecules\, the probability of the muon transfer from $\\mu d^*$ to $\ \mu d$\, the upper limit for the “effective” $^3\\!He\\mu d$ fusion de cay rate\, yields of $^3\\!He\\mu d$ molecules have been obtained and pres ented.\n\n1. M.P. Faifman and L.I. Men'shikov\, Hyperfine Interact. 119\, 127 (1999).\n2. V.A. Ganzha et al.\, PNPI Main Scientific Activities HEPD 2007–2012\, 106 (2013).\n\nhttps://events.sinp.msu.ru/event/8/contributi ons/468/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/468/ END:VEVENT BEGIN:VEVENT SUMMARY:Experiments to search for singlet deuteron and problem of the dine utron DTSTART;VALUE=DATE-TIME:20220715T145000Z DTEND;VALUE=DATE-TIME:20220715T151000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-479@events.sinp.msu.ru DESCRIPTION:Speakers: Sergey Borzakov (FLNP JINR)\nThe possibility of the existence of quasi-stationary state of a neutron and a proton in the 1S0 s tate with a mass slightly less than the sum of the masses of the neutron a nd proton is discussed in a number of works. This work discusses the manif estations of this level in electromagnetic interactions - radiative captur e np-dγ and scattering of gamma quanta by deuterons. The problem of the existence of the singlet deuteron is connected with the question of the ex istence of the dineutron. Literature data on this problem are presented. \ n\n1. T. Belgya\, S.B. Borzakov\, M. Jentschel\, B. Maroti\, Yu.N. Pokotil ovski\, L. Szentmiklosi\, Phys. Rev. C99\, 044001 (2019).\n2. S.B. Borza kov\, E-ArXive\, nucl-ex: 2105.10286 (2021).\n\nhttps://events.sinp.msu.ru /event/8/contributions/479/ LOCATION: Физический ф-т\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/479/ END:VEVENT BEGIN:VEVENT SUMMARY:Nuclei Identification by Multiple Energy Losses in Detectors of th e PAMELA Spectrometer DTSTART;VALUE=DATE-TIME:20220715T070000Z DTEND;VALUE=DATE-TIME:20220715T072000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-481@events.sinp.msu.ru DESCRIPTION:Speakers: Vladislav Alekseev (Yaroslavl State University)\nPAM ELA magnetic spectrometer [1] includes a set of detectors\, each of which measures the energy losses of charged particles along its trajectory. In t otal\, it is possible to obtain up to 6 values of energy loss in detectors of the time-of-flight system\, up to 12 values in the track system\, and up to 43 values in the calorimeter. This information combined with rigidit y and velocity measurements can be used for effective identification of pa rticles.\nWe propose two algorithms for identification of nuclei with atom ic numbers 1 – 26 (from protons up to iron): the first algorithm is base d on maximum likelihood estimation method\, and the second is based on mac hine learning. For both algorithms we performed Monte Carlo simulation of particles interaction in detectors of PAMELA with Geant4 software [2].\nTh e first algorithm consists of the following steps.\n1. Fit the energy loss distributions in simulation for each detector depending on particle type and magnetic rigidity $R$ by a 2-parametric family of distributions $f(x\; \\mu\, \\sigma)$. \n2. Approximation of the relation between parameters $ (\\mu\, \\sigma)$ and particle rigidity by some functions $\\hat{\\mu}(x)$ and $\\hat{\\sigma}(x)$. As a result\, we obtain a set of functions $\\ha t{\\mu}_{ij}(x)$ and $\\hat{\\sigma}_{ij}(x)$ for each nucleus number (cha rge) $i$ and detector number $j$.\n3. After that\, we can apply an algorit hm to the experimental data. For each nucleus type calculate a likelihood function (where $R$ is magnetic rigidity):\n$$L_i(R) = \\sum\\limits_{j = 1}{N} \\ln f(R\; \\hat{\\mu}_{ij}(R)\, \\hat{\\sigma}_{ij}(R))$$\nThe resu lt of an identification algorithm is a nucleus $n$\, which minimizes $L_i (R)$:\n$$\\hat{n} = \\arg\\min\\limits_{i}⁡L_i(R).$$\nThe second method is based on machine learning using the gradient boosting method\, which is currently one of the reference methods of classical learning [3]. The mag netic rigidity and energy releases along the trajectory are used as featur es.\nWe present the results of each of the above methods separately\, as w ell as in comparison with each other.\n1. Adriani O. et al. Astrophys J (2 014) 791:93\n2. S. Agostinelli et al.\, Nucl. Instrum. Meth. A 506\, pp. 2 50-303\, 2003.\n3. Friedman\, Jerome. (2000). Greedy Function Approximatio n: A Gradient Boosting Machine. The Annals of Statistics. 29.10.1214/aos/1 013203451\n\nhttps://events.sinp.msu.ru/event/8/contributions/481/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/481/ END:VEVENT BEGIN:VEVENT SUMMARY:RADIATIVE CAPTURE IN THE $^4$He + $^2$H SYSTEM IN THE FRAMEWORK OF A MICROSCOPIC APPROACH DTSTART;VALUE=DATE-TIME:20220715T140900Z DTEND;VALUE=DATE-TIME:20220715T142900Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-498@events.sinp.msu.ru DESCRIPTION:Speakers: Alexander Solovyev ()\nThe $^4$He + $^2$H system is of great importance for nuclear astrophysics because the radiative capture proceeding in this system is responsible for production of the $^6$Li nuc lei during the primordial nucleosynthesis. In this work\, the $^4$He + $^2 $H radiative capture reaction is considered from the microscopic viewpoint within a developed approach [1\, 2] based on clustering aspects of nuclea r structure and dynamics and formalism of expansions over the oscillator b asis. The cross section of the reaction in terms of the astrophysical $S$ factor is calculated. The low-energy dependence of the total astrophysical $S$ factor serves as a source of information useful for the so-called sec ond “lithium puzzle”. A comparison of the obtained results with experi mental data is performed.\n\n1. A. S. Solovyev and S. Yu. Igashov\, Phys. Rev. C 96\, 064605 (2017).\n2. A. S. Solovyev and S. Yu. Igashov\, Phys. R ev. C 99\, 054618 (2019).\n\nhttps://events.sinp.msu.ru/event/8/contributi ons/498/ LOCATION: Физический ф-т\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/498/ END:VEVENT BEGIN:VEVENT SUMMARY:CRYOGENIC GAS CATHER STOPPING ENERGY EFFICIENCY SIMULATION DTSTART;VALUE=DATE-TIME:20220712T095000Z DTEND;VALUE=DATE-TIME:20220712T101000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-497@events.sinp.msu.ru DESCRIPTION:Speakers: Alena Kohoutova (Joint Institute for Nuclear Researc h\, Flerov Laboratory of Nuclear Reactions\, Joliot Curie 6\, Dubna\, Mosc ow region\, 141980 Russia\; Faculty of Science of Palacký University Olom ouc\, 17. listopadu 1192/12\, 779 00 Olomouc\, Czech Republic)\nThe mass i s a fundamental property of an atom comprising all information on its cons tituents and their interactions. Thus\, it carries information on the inte rnal structure of the nucleus\, reveal the quantum mechanical shell struct ure within complex nuclei and determine the energy available for nuclear t ransformations in radioactive decay processes. Mass measurements allow us to benchmark nuclear models and thus contribute to investigations of the n ature of the strong interaction itself. With the aim of high-precision mas s measurement (HPMM) of heavy and super heavy elements\, a new experimenta l setup is being built in FLNR\, Dubna. The setup consists of the followin g parts: target unit\; gas-filled separator of complete fusion reaction pr oducts\; cryogenic gas stopping cell (CGSC)\; a radio-frequency system for transporting and cooling a low-energy beam\; and a multi-reflection time of flight mass spectrometer (MR-TOF MS). CGSC is responsible for the final slowing down and thermalizing the energy-bunched fragments produced and s elected in the Gas Filled Separator. The thermalization is achieved in a v olume filled with ultra-pure helium gas at cryogenic temperatures. After t he thermalization\, the fragments are extracted and transported with a rad io frequency quadrupole (RFQ) to the MR-TOF MS. The stopping and thermaliz ation of the incoming fusion-evaporation residuals (EVRs) is a key step in HPMM of the heaviest elements. Due to the typically low incoming ion rate s and low particle integrals CGSC has to be as efficient as possible. The HPMM requires at least a few ions for a measurement any loss should be avo ided. The kinetic energy of the incident EVR\, the entrance window foil ty pe and thickness as well as the buffer-gas type and density of the CGSC co ndition the stopping efficiency. Only the ions that are stopped within the active gas volume of the CGSC can be extracted. The stopping efficiencies for EVRs cannot be tested on-line and one have to rely on simulations. To use the CGSC on ion beam the optimal entrance window foil thickness for e very reaction is necessary evaluate. The Geant4 and SRIM software packages was used in these simulations with different entrance window materials an d beam and target combinations.\n\nhttps://events.sinp.msu.ru/event/8/cont ributions/497/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/497/ END:VEVENT BEGIN:VEVENT SUMMARY:ENERGY DEPENDENCE OF TOTAL REACTION CROSS SECTIONS FOR ISOTOPES OF Be ON TARGETS ${}^{28}$Si\, ${}^{59}$Co\, ${}^{181}$Ta DTSTART;VALUE=DATE-TIME:20220712T091000Z DTEND;VALUE=DATE-TIME:20220712T093000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-501@events.sinp.msu.ru DESCRIPTION:Speakers: Sergey Stukalov (JINR\, Dubna\, Russia)\nEnergy depe ndence of the total cross sections σ${_{\\rm{R}}}$(*E*) for reactions ${} ^{10\,11\,12}$Be + ${}^{28}$Si\, ${}^{59}$Co\, ${}^{181}$Ta are presented. The 4π-methods of σ${_{\\rm{R}}}$ measurements are based on registratio n of prompt γ-quanta and neutrons using a 12-module 4π-spectrometer [1]. The results of the two methods for calculating the total reaction cross s ections are presented.\n\nThe values of σ${_{\\rm{R}}}$ were calculated t aking into account:\n\n 1. the mean detection efficiency of the 4π-spect rometer\, which does not depend on γ-multiplicity *M*${_{{\\gamma}}}$ [2] \; \n 2. the distribution of the numbers of triggered detectors during reg istration of the cascades of particles at a fixed value of multiplicity *M *${_{{\\gamma}}}$. \n\nMeasurement of the detection efficiency ε(*M*${_{{ \\gamma}}}$) for various values of γ-multiplicity *M*${_{{\\gamma}}}$ was carried out using the method described in [3].\n\n1. Yu.G. Sobolev\, Yu.E . Penionzhkevich\, V.V. Samarin\, M.A. Naumenko\, S.S. Stukalov\, I. Sivá ček\, S.A. Krupko\, A. Kugler\, and J. Louko\, Bull. Russ. Acad. Sci.: Ph ys. 84\, 948 (2020).\n2. Yu.E. Penionzhkevich\, Yu.G. Sobolev\, V.V. Samar in\, and M.A. Naumenko\, Phys. Atom. Nucl. 80\, 928 (2017).\n2. Yu.E. Peni onzhkevich\, Yu.G. Sobolev\, V.V. Samarin\, M.A. Naumenko\, N.A. Lashmanov \, V.A. Maslov\, I. Siváček\, and S.S. Stukalov\, Phys. Rev. C 99\, 0146 09 (2019).\n\nhttps://events.sinp.msu.ru/event/8/contributions/501/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/501/ END:VEVENT BEGIN:VEVENT SUMMARY:TIME-DEPENDENT MICROSCOPIC DESCRIPTION OF FAST ALPHA PARTICLES EMI TTED IN NUCLEUS-NUCLEUS COLLISIONS DTSTART;VALUE=DATE-TIME:20220712T070000Z DTEND;VALUE=DATE-TIME:20220712T072000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-505@events.sinp.msu.ru DESCRIPTION:Speakers: Viacheslav Samarin (Joint Institute for Nuclear Rese arch)\nAppearance of new experimental data on the energy spectra of fast a lpha particles emitted in heavy-ion reactions [1\,2] requires development of microscopic models of such processes. The mechanism of nonequilibrium e mission of alpha particles after capture of the projectile nucleus by the target nucleus is studied within the microscopic approach based on the tim e-dependent Schrödinger equation for the wave function of an alpha partic le [1\,3] (Fig. 1). Transfer of energy from the colliding nuclei to the al pha particle is studied in the quantum three-body one-dimensional time-dep endent model [4]. The possibility of cooling of superheavy compound nuclei via emission of fast alpha particles (e.g.\, in the reaction ) is discus sed.\n\nFig. 1. Evolution of the wave function of emitted alpha particle i n the collision of `${}^{48}$Ca + ${}^{197}$Au at beam energy 280 MeV.\n\ n1. Yu. E. Penionzhkevich\, V. V. Samarin\, V. A. Maslov *et al*.\, Phys. At. Nucl. 84\, 115 (2021).\n2. Yu. E. Penionzhkevich\, S. M. Lukyanov\, V. A. Maslov *et al*.\, Phys. At. Nucl. 85\, 145 (2022).\n3. V. V. Samarin\, Phys. At. Nucl. 81\, 486 (2018).\n4. V. I. Zagrebaev and V. V. Samarin\, Phys. At. Nucl. 70\, 1003 (2007).\n\nhttps://events.sinp.msu.ru/event/8/co ntributions/505/ LOCATION: Физический факультет\, ЦФА URL:https://events.sinp.msu.ru/event/8/contributions/505/ END:VEVENT BEGIN:VEVENT SUMMARY:A NOVEL APPROACH FOR TAKING INTO ACCOUNT THE ZERO-POINT OSCILLATIO NS IN CALCULATING HEAVY-ION FUSION CROSS-SECTIONS DTSTART;VALUE=DATE-TIME:20220714T122000Z DTEND;VALUE=DATE-TIME:20220714T124000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-508@events.sinp.msu.ru DESCRIPTION:Speakers: Maria Chushnyakova (Omsk State Technical University) \nIt had been shown [1] that accounting for the zero-point oscillations (Z PO) of the shape of colliding complex nuclei results in increasing substan tially the calculated sub-barrier capture (fusion) cross-sections. Calcula tions in [1] was made in a simplified way with a schematic nucleus-nucleus potential.\nIn the present work we develop an advanced method for taking into account the ZPO of quadrupole mode for both collision partners. Withi n this method we evaluate the sub-barrier capture cross-sections for sever al reactions and compare the results with the experimental data. \n In our novel approach\, the nucleus-nucleus bare potential results from the s emi-microscopic double-folding model with M3Y-Paris nucleon-nucleon forces [2\,3]. For this aim\, we generalize the earlier published code [4]. In t his generalization\, we heavily rely on Ref. [5]. \nThe nucleon densities come from the Hartree-Fock-Bogoliubov calculations [6]. For each collision partner\, about 10 quadrupole deformations are accounted for with the app ropriate probabilities. The transmission coefficients are evaluated by mea ns of the WKB approximation below the barrier and using the single parabol ic barrier approximation above the barrier.\nNeglecting the ZPO typically results in the theoretical sub-barrier cross-sections to be below the data whereas accounting for the quadrupole ZPO often improves the situation.\n \n1. H. Esbensen\, Nucl. Phys. A 352\, 147 (1981).\n2. D. T. Khoa\, G. Sat chler\, W. von Oertzen\, Phys. Rev. C. 56\, 954 (1997)\n3. M. V. Chushnyak ova\, I. I. Gontchar\, Bull. Russ. Acad. Sci. Phys. 80 (2016) 938.\n4. I. I. Gontchar\, M. V. Chushnyakova\, Comp. Phys. Comm. 222\, 414 (2018).\n5. M. J. Rhoades-Brown\, V. E. Oberacker\, M. Seiwert\, and W. Greiner\, Zei tschrift Für Phys. A 310 (1983) 287.\n6. T. Belgya et al.\, IAEA-TECDOC-1 506 (2006). http://www-nds.iaea.org/RIPL-2/\n\nhttps://events.sinp.msu.ru/ event/8/contributions/508/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/508/ END:VEVENT BEGIN:VEVENT SUMMARY:Construction Management Information System at JINR DTSTART;VALUE=DATE-TIME:20220715T101000Z DTEND;VALUE=DATE-TIME:20220715T103000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-519@events.sinp.msu.ru DESCRIPTION:Speakers: Cesar Ceballos Sanchez (JINR)\nEarlier this year the commissioning of an all-around Construction Management information System (CMIS) was completed as a joint effort of two JINR Laboratories (LHEP and LIT). The system is particularly useful for the fine-grained control and continuous feedback of the production of complex multipart objects like t he detectors subsystems composing the MultiPurpose Detector of the NICA fa cility at LHEP. The structure and functonalities of CMIS at JINR are based on a previous system developed by Kybernetika s.r.o.(Slovak Republic) for the upgrade of the Inner Tracking System of the ALICE experiment at CERN and was reconfigured to be transferred and deployed on the available comp utational platform of JINR in a joint effort by specialists from Kyberneti ka and JINR's LIT and LHEP. The system is composed of a web user interface and a collection of web-accessible API functions that are connected to an Oracle database. The CMIS may hold several projects at the same time and for each of them it allows to control several aspects of the production pr ocess including (but is not limited to) the human resources\, the project organization and planning\, as well as the current status and tests result s history of every component of the detector consenting for the direct int erfacing of the assembly and testing hardware/software to the construction database\, so that information ranging from the current location of a com ponent in-transit to/from an assembly site down to the final position of a single chip inside the detector may be tracked down and recorded.\nCurren tly\, the CMIS is meant to be used to follow the production of silicon tra cker detectors at the STS department of the LHEP at JINR but since it is c entrally hosted at LIT it might be also used by other hardware production projects at JINR (or outside) whose complexity would make it very hard to fulfilling its quality and timing requirements otherwise.\nIn this present ation a general overview of the full system will be given along with a foc using on the modules that allow specifically for the control of the produc tion and assembly of the hardware to be produced. It will also include rea l examples of custom cross-platform user interfaces developed for the easy use of the system by the operators.\n\nhttps://events.sinp.msu.ru/event/8 /contributions/519/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/519/ END:VEVENT BEGIN:VEVENT SUMMARY:DEUTERON BEAM VECTOR POLARIZATION MEASUREMENT USING PROTON-PROTON QUASIELASTIC SCATTERING AT THE ENERGIES FROM 200 TO 650 MEV/NUCLEON DTSTART;VALUE=DATE-TIME:20220715T095000Z DTEND;VALUE=DATE-TIME:20220715T101000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-522@events.sinp.msu.ru DESCRIPTION:Speakers: Ivan Volkov (LHEP JINR)\nThe deuteron beam vector po larization was obtained at the Nuclotron Internal Target Station using qua sielastic proton-proton scattering on the polyethylene target. The select ion of useful events was performed using the time and amplitude informatio n from scintillation counters. The asymmetry on hydrogen was obtained by t he subtraction of the carbon background. The values of vector polarization were obtained at the beam energies of 200\, 500\, 550\, and 650 MeV/nucle on. The obtained values are compared with the data obtained in the deutero n-proton elastic scattering at the beam energy of 135 MeV/nucleon.\n\nhttp s://events.sinp.msu.ru/event/8/contributions/522/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/522/ END:VEVENT BEGIN:VEVENT SUMMARY:DIFFERENTIAL CROSS-SECTIONS FOR ELASTIC BACKSCATTERING OF ALPHA PA RTICLES BY CARBON DTSTART;VALUE=DATE-TIME:20220715T145000Z DTEND;VALUE=DATE-TIME:20220715T151000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-532@events.sinp.msu.ru DESCRIPTION:Speakers: Timofey Bobrovskii ()\nDifferential cross-sections f or 12C(a\,a0)12C scattering have been measured at the 150° and 170° angl es for alpha beam energies ranging from 3.5 to 6.5 MeV. At alpha beam ener gies greater than ~2.2 MeV the 12C(a\,a0)12C cross-section is non-Rutherfo rd. For ion beam analysis of carbon\, enhanced cross-sections at elevated energies provide increased sensitivity and separation of the partial spect rum of carbon against the background of heavier elements. To accurately de termine the carbon content requires the use of precise cross sections at t he energy and backscattering angle of interest. Since apparent discrepanci es between different sets of available experimental data result in signifi cant uncertainties in the evaluated 12C(a\,a0)12C cross-sections [1] new m easurements were undertaken followed by a revision of the current evaluati on [2]. \nMeasurements were carried out at the 3 MV tandem accelerator of IPPE with an energy step of 5–10 keV. A polished pyrolylitic graphite bu lk target of a natural isotopic abundance was used in the experiment in or der to avoid problems with carbon build up. The backscattering cross-secti ons were obtained from the measured spectra by fitting in a narrow energy window near the high energy edge of the spectrum\, the cross-section being a free parameter. Fitting was performed by the COBYLA method [3] using th e OLE automation technique provided by the SIMNRA-7 program [4]. The obtai ned results were incorporated in the data set for the cross-section evalua tion performed in the framework of the R-matrix theory.\n \n1. E.V. Gai\, A.F. Gurbich\, Nucl. Instr. Meth. B296\, 87 (2013).\n2. A.F. Gurbich\, Nuc l. Instr. Meth. B371\, 27 (2016).\n3. M.J.D. Powell\, Cambridge University Technical Report DAMTP 2007.\n4. M. Mayer\, SIMNRA User`s guide. Tech. re p. IPP 9/113. Garching: Max-Planck-Institute fur Plasmaphysik\, 1997.\n\n https://events.sinp.msu.ru/event/8/contributions/532/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/532/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of multinucleon transfers in reactions with 48Ca ions on Au\ , U targets at an energy of 280 MeV DTSTART;VALUE=DATE-TIME:20220715T130000Z DTEND;VALUE=DATE-TIME:20220715T132000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-531@events.sinp.msu.ru DESCRIPTION:Speakers: Aleksei Shakhov (JINR)\nRecently\, there has been in creased interest in experimental studies on the production of new isotopes in multinucleon transfer reactions [1\,2]. Reactions on 48Ca ion beams ar e successfully used for the synthesis of new nuclei in a wide range of mas ses and charges. In particular\, it is of interest to obtain new isotopes with the number of neutrons N = 126 in the reaction channels of multinucle on transfers [3]. To estimate the cross sections for the formation of nucl ei in these reactions\, we conducted an experiment on their detection. In the experiment\, nuclei with masses greater than the target mass values we re measured. \nThe experiment was carried out on a 48Ca (5\,8 MeV/nucleon) ion beam using 197Au (6 µm thick) and 238U (1 µm thick) targets. Specia lly prepared targets were irradiated on a beam of accelerated ions\, on a cyclotron U-400 at the FLNR JINR. The activation method was used to identi fy the nuclei formed in the reactions. Measurement of induced activity (ga mma and alpha) was carried out in the “off-linе” mode. \nIn the react ion of 48Ca+Au\, neutron pickup channels for 1n and 3n were measured. The cross sections of these channels were σ (+1n) - 150 mb and σ (+3n) – 0 .5 mb\, respectively. The GRAZING [4] code used to analyze the obtained va lues gives a good agreement with the experimental results.\nIn the 48Ca+Au reaction induced alpha activity of 206Po nuclei was observed\, which corr esponds to the transmission channel (+5p+9n) from the projectile nucleus t o the target nucleus.\nThe 48Ca+U reaction products were measured using an alpha spectrometer. Among the products\, the nuclei 228Th\, 239Am\, 255Fm were identified by the measured half-lives and characteristic energies of alpha particles. These products correspond to the following channels 238U (-2p-8n) → 228Th\, 238U(+3p-2n) → 239Am\, 238U(+8p-+9n) → 255Fm. The value of the section of these channels σ(228Th) ~ 55 μb\, σ(239Am) ~ 1 .2 μb\, σ(255Fm) ~ 2.2 μb.\nThus\, the cross section data show that suc h reactions are suitable for obtaining nuclei of multinucleon transfers. F urther analysis of the obtained data is underway.\n\nhttps://events.sinp.m su.ru/event/8/contributions/531/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/531/ END:VEVENT BEGIN:VEVENT SUMMARY:The investigation in non-statistical mechanisms of photonuclear em ission of charged particles on molybdenum DTSTART;VALUE=DATE-TIME:20220713T141000Z DTEND;VALUE=DATE-TIME:20220713T143000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-536@events.sinp.msu.ru DESCRIPTION:Speakers: Pavel Remizov (MSU)\nIt is generally accepted that p hotonuclear reactions caused by photons occur in two stages in region of g iant dipole resonance (GDR): the excitation of the nucleus as a system and its decay according to statistical laws. Neutron emission is the most wel l studied decay channel. Its output has a much greater magnitude than othe r reactions: (γ\, 2n)\, (γ\, p)\, etc. In addition\, the direct registra tion of reaction products doesn’t allow to attribute nucleons to specifi c channel reliably if thresholds of several reactions are exceeded. Thus\, the photonuclear reactions with the emission of charged particles are stu died poorly. However\, they point out the domination of non-statistical de cay mechanisms in GDR region. For example\, the collective model overestim ates the yields of reactions with the neutron emission and significantly u nderestimates the reactions with the proton emission in nuclei with A > 90 . The isospin splitting of GDR effect is the reason for this. \nWe've inve stigated the photonuclear reactions on molybdenum isotopes for bremsstrahl ung with 20\, 40 and 55 MeV in this research. (γ\, p)\, (γ\, pn)\, (γ\, p2n)\, (γ\, α) and (γ\, αn) are studied. 20 MeV bremsstrahlung allows to distinguish the dominant reaction. 40 and 55 MeV bremsstrahlung enable to follow cross sections changes.\nThe values calculated in Talys1.95 are much smaller than the observed ones. We’ve tested method of isospin spl itting consideration for (γ\, p)-reactions and it has provided us with th e values which are close to experiments.\nThe statistical model also gives a strong yield underestimation for the reactions with the emission of α- particles\, for which the Coulomb barrier is essential in its framework. T he observed yield can be explained by the contribution of semi-direct reac tions occurring on time scales of 10-21 s when the barrier does not have e nough time to form and inhibit (γ\, α). Our results shows the connection s between yields and nuclear shell completeness. If the residual nucleus h as the magic number of neutrons (N = 50 in our case) then yield is much hi gher for such a reaction.\n\n\nThe reported study was funded by RFBR\, pro ject number 20-315-90124.\n\nhttps://events.sinp.msu.ru/event/8/contributi ons/536/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/536/ END:VEVENT BEGIN:VEVENT SUMMARY:Application of unfolding method for obtaining nuclear data DTSTART;VALUE=DATE-TIME:20220713T152000Z DTEND;VALUE=DATE-TIME:20220713T154000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-554@events.sinp.msu.ru DESCRIPTION:Speakers: David Knezevic (Institute of Physics Belgrade\, Serb ia)\nThe unfolding method is a well-known technique used in nuclear physic s. This method is usually used to unfold the neutron spectrum based on a m easurement of neutron activities in various energy ranges and known cross sections for reactions of interest. But it has also found application in various fields of nuclear physics. The basis of this method is that the ac tivity measured in an experiment \,when the activity is induced by nuclear reaction\, is proportional to the product od the cross section for the re action and the flux of the projectile particles. Then\, combining the meas urements of activities with the well known values of one of the spectrum i nvolved\, the other one can be determined from the set of initial assumpti ons about the spectrum (default)\, which can be a theoretical calculation or any other available source. This spectrum is then unfolded in order to better describe the experimentally obtained results.\n\nThis allows for va rious usage of the unfolding methods within the field of nuclear physics\, which will be presented here. It can be used to approximate the presence of neutrons at the place of the HPGe detector based on the activities of a ctivated Ge isotopes after the interaction of the neutrons with the nuclei of the detector. By using the theoretical spectrum for the neutron flux f rom cosmic rays at ground level\, this spectrum can be unfolded to better describe the actual neutron spectrum at the position of HPGe detector[1]. In the case of photo-nuclear reactions\, if the photon flux is well known\ , based on the measured activities\, it is possible to test various theore tical values of cross section by inserting them as a default functions and comparing the unfolded spectrum with the theoretical spectrum [2]. In cas e of photo-nuclear reaction where the cross section is well known\, it can be used to determine the photon flux\, by using the theoretical bremsstra hlung spectrum as a default function.\n\nIn this work\, we will present pr eviously done work and possible future applications of the unfolding metho d in the field of nuclear physics. \n\n\n1. D. Knežević\, et al.\, Nucl. Instrum. Methods. A\, 833\, 23 (2016)\n2. Medic\, Z.\, et al.\, Eur. Phys . J.\, 57.8\, 1 (2021)\n\nhttps://events.sinp.msu.ru/event/8/contributions /554/ LOCATION: Физический ф-т\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/554/ END:VEVENT BEGIN:VEVENT SUMMARY:OBSERVATION OF THE SHAPE ISOMER STATES IN FISSION FRAGMENTS FROM ( γ\, f) REACTIONS DTSTART;VALUE=DATE-TIME:20220712T070000Z DTEND;VALUE=DATE-TIME:20220712T072000Z DTSTAMP;VALUE=DATE-TIME:20260912T193312Z UID:indico-contribution-34-573@events.sinp.msu.ru DESCRIPTION:Speakers: Dmitry Kamanin (JINR)\nThe experiments were performe d at the beam of the MT-25 microtron\, FLNR\, JINR\, using VEGA (V–E Gui de based Array) setup. Fission fragments (FFs) from the $^{235\, 238}$U ($ ɣ\, f$) reactions are captured by the electrostatic guide system (EGS). T he EGS constitutes a cylindrical capacitor of four meters long with a thin wire as a central electrode. Some part of the ions emitted from the targe t at one end of the guide can be involved in the spiral-like movement alon g the guide axis [1]. By this way the FFs are transported to the time-of-f light mass-spectrometer consisted of the microchannel-plates based timing detector and the mosaic of four PIN diodes. The mean time-of-flight of the FFs in the EGS exceeds 400 ns.\nThe peculiarities of the two dimensional FFs mass correlation distributions observed let us to suppose the followin g nature of such peculiarities (linear structures) [2]. Very deformed FF f rom binary ($ɣ\, f$) reaction undergoes a break-up crossing the Lexan foi l of the timing detector due to inelastic Coulomb scattering. It is possib le if the fragment was born in the shape isomer state with a typical life time of more than 400 ns. Earlier\, manifestations of similar process in $ ^{252}$Cf(sf) and $^{235}$U($n$$_{th}$\, $f$) we discussed in Ref. [3].\n\ nhttps://events.sinp.msu.ru/event/8/contributions/573/ LOCATION: Физический факультет\, СФА URL:https://events.sinp.msu.ru/event/8/contributions/573/ END:VEVENT END:VCALENDAR