BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:DETERMINATION OF THE ENERGY OF HIGH-ENERGY PROTONS (1 TEV AND HIGH ER) BY THE LFM METHOD DTSTART;VALUE=DATE-TIME:20220713T081000Z DTEND;VALUE=DATE-TIME:20220713T083000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-555@events.sinp.msu.ru DESCRIPTION:Speakers: Anastasiya Fedosimova ()\nCalorimetric methods are c urrently practically the only way to directly measure the characteristics of high energy (TeV and higher) cosmic nuclei. The primary particle\, inte racting with the substance of the calorimeter\, gives rise to a cascade of secondary particles in it. To measure the characteristics of the cascade\ , the dense matter is interbedded with special detectors. Based on the mea surements of signals from these detectors\, a cascade curve is formed. If the cascade curve has reached a maximum in the calorimeter\, then the prim ary energy is reconstructed quite accurately. However\, to measure the max imum of the cascade\, the calorimeter must have a sufficiently large thick ness (and so large weight). When using thin calorimeters\, the primary ene rgy is determined with a large error (30-70 percent when measuring hadroni c cascades) due to significant fluctuations in the development of the casc ade curve. In this regard\, the energy spectrum of cosmic rays for energie s of 1-100 TeV is currently poorly understood\, since different experiment al groups present different spectra of cosmic rays.\nIn this paper\, to so lve this problem\, it is proposed to use the Lessening Fluctuation Method (LFM) based on correlation curves. In this method\, instead of cascade cur ves\, correlation curves of the dependence of the cascade size on the rate of cascade development are used. The cascade development rate is understo od as a quantity equal to the difference in the cascade sizes at two measu rement levels\, divided by the thickness of the calorimeter\, during the p assage of which this change in the cascade size occurred. The rate of casc ade development depends on the primary energy and therefore it can be used as an additional quantity to improve the accuracy of primary energy recon struction. The correlation curves almost do not fluctuate and make it poss ible to determine the energy of cascades that have not reached a maximum. To test the LFM\, we simulated the passage of cascades formed by protons w ith energies of 1-10 TeV through the PAMELA collaboration calorimeter. Bas ed on the simulation\, it was shown that the correlation curves almost do not fluctuate. This makes it possible to significantly reduce measurement errors (up to ~10 percent when measuring hadron cascades). Moreover\, LFMs make it possible to correctly determine the energy of cascades that have not reached their maximum. This makes it possible to solve the problem of the large weight of the calorimeter.\nThe study was financially supported by the Ministry of Education and Science of the Republic of Kazakhstan (gr ant no. AP08855403).\n\nhttps://events.sinp.msu.ru/event/8/contributions/5 55/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/555/ END:VEVENT BEGIN:VEVENT SUMMARY:SiC Nuclear Radiation Detectors after Irradiation by Heavy Ions an d Neutrons DTSTART;VALUE=DATE-TIME:20220713T070000Z DTEND;VALUE=DATE-TIME:20220713T072000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-208@events.sinp.msu.ru DESCRIPTION:Speakers: L. Hrubcin (JINR\, IEE SAS)\nSilicon carbide (SiC) i s very perspective material for fabrication radiation-tolerant electronics \, high-temperature electronics as well as for nuclear radiation detectors for working in harsh environments. SiC has obtained increasing interest d ue to achievement of a high purity level in the crystal structure and cons iderable thickness (> 100 µm) in the epitaxial layer. SiC is mostly inves tigated for its physical properties\, e.g.: the band gap energy of the pol ytype 4H-SiC is 3.26 eV\, the mean energy of electron-hole pair creation i s 7.78 eV\, the electron saturation drift velocity is 2 x 10^7 cm/s and th e breakdown voltage is 2 x 10^6 V/cm at room temperature. Detectors based on high quality epitaxial layer of 4H-SiC show a high radiation hardness\, good spectroscopic resolution and can operated not only at room but also at elevated temperatures (~300°C) [1\,2].\nOur detector structures [3] we re prepared on a 25 µm or 50 µm thick nitrogen-doped 4H­SiC layer (dono r doping < l x 10^14 cm-3) grown by the liquid phase epitaxy on a 4" SiC w afer (donor doping ~ 2 x 10^18 cm-3\, thickness 350 µm). Circular Schottk y Ni/Au contact (diameter 3.0 mm\, thicknesses 10/30 nm) to 4H-SiC layer w as formed through a contact metal mask\, while full area Ti/Pt/Au contact (thicknesses 10/30/90 nm) was evaporated on the other side (substrate).\nE lectrical characteristic of prepared SiC detectors were measured using Kei thley measuring complex\, which consisted of 4200A-SCS Parameter Analyzer\ , 2657A High Power System and CVIV Multi-Switch. Current-voltage and capac ity-voltage (C-V) measurements were performed up to 300 V. The reverse bre akdown voltage exceeded 300 V and the reverse current was below 10 pA. Fro m C-V measurements the depletion thickness and doping concentration profil e were calculated. Spectroscopic parameters were measured with alpha sourc es 226Ra and 238Pu and FWHM of SiC detectors varied round of 20 keV for 5. 5 MeV α-particles energy.\nSiC detectors were irradiated by high-energeti c beam of heavy ions of Xenon with energy of 165 MeV at the IC-100 cyclotr on of the Joint Institute for Nuclear Research (JINR) in Dubna up to dose 1.5 x 10^10 cm-2. We also studied the effect of the degradation of these d etectors under impact of neutrons at the neutron reactor IBR-2 (JINR) up t o dose 3.4 x 10^15 cm-2.\nPrepared SiC detectors shown good energy resolut ion and high radiation resistance against heavy ions and neutrons and will be used in experiments at JINR.\n\n1. F.H. Ruddy and J.G. Seidel\, NIM in Phys. Res. B 263\, 163 (2007).\n2. D. Puglisi and G. Bertuccio\, Micromac hines 10\, 835 (2019).\n3. B. Zat'ko et al.\, Applied Surface Science 536\ , 147801 (2020).\n\nhttps://events.sinp.msu.ru/event/8/contributions/208/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/208/ END:VEVENT BEGIN:VEVENT SUMMARY:COMPACT NEUTRON CALIBRATION SOURCE BASED ON 252Cf RADIONUCLIDE AND A SILICON SEMICONDUCTOR DETECTOR DTSTART;VALUE=DATE-TIME:20220713T070000Z DTEND;VALUE=DATE-TIME:20220713T072000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-221@events.sinp.msu.ru DESCRIPTION:Speakers: Maxim Trushin (NRC "Kurchatov Institute" - PNPI)\nTh is work will demonstrate the operation of a model of compact neutron calib ration source. Compact neutron calibration source is highly needed for cal ibration and response function determination of WIMP-oriented dark matter detectors and electron antineutrino detectors. This could be done with neu tron calibration source with either known neutron energy spectrum\, or by time-of-flight (ToF) neutron energy reconstruction. \nSuggested neutron ca libration source is based on Californium-252 radionuclide which undergoes spontaneous fission producing neutrons with a continuous spectrum and a se miconductor detector. The latter upon registration of fission fragments si gnal provides a time reference of the moment of neutron creation. \nFor r egistration of the fission fragments signal we used a silicon semiconducto r detector with thin entrance window. Performed investigations have proved that such a detector may withstand exposure of up to 10^9 of fission frag ments before the critical degradation of its operating parameters occurs [ 1]. The spectra of neutrons and γ-quanta produced during the spontaneous fission of 252Cf nuclei were recorded with help of PMMA scintillator equip ped with photomultipliers of type 97. The scintillator represents a cylind er with a wall thickness of 7 cm and an internal diameter of 13 cm. In the center of scintillator cylinder a 252Cf source and a semiconductor detect or were placed. \nThese two registration channels for neutrons and fission fragments\, respectively\, operates in the coincidence mode in order to e stablish the correlation between the fission fragments and neutron / γ-qu anta signals\, which\, in turn\, can be separated by accounting the delay time of the neutron arrival. Therefore\, the possibility of using a combin ation of the semiconductor detector and 252Cf radionuclide as a compact ne utron calibration source will be demonstrated.\n\n1. S.V. Bakhlanov\, A.V. Derbin\, I.S. Drachnev\, O.I. Konkov\, I.M. Kotina\, A.M. Kuzmichev\, I.S . Lomskaya\, M.S. Mikulich\, V.N. Muratova\, N.V. Niyazova\, D.A. Semenov\ , M.V. Trushin\, E.V. Unzhakov\, Journal of Physics: Conference Series 210 3\, 012138 (2021).\n\nhttps://events.sinp.msu.ru/event/8/contributions/221 / LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/221/ END:VEVENT BEGIN:VEVENT SUMMARY:STUDIES OF RADON CONCENTRATION IN RESIDENTIAL AND PUBLIC BUILDINGS LOCATED IN THE TIEN SHAN FOOTHILLS AND THE NEVA LOWLAND AREAS DTSTART;VALUE=DATE-TIME:20220713T080000Z DTEND;VALUE=DATE-TIME:20220713T082000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-234@events.sinp.msu.ru DESCRIPTION:Speakers: Vyacheslav Dyachkov (al-Farabi Kazakh National Unive rsity)\nThe large territories of the Republic of Kazakhstan and the Russia n Federation are characterized by a different radiation environment due to the mining (coal\, gas\, non-ferrous metals and uranium)\, the geological conditions\, seismic activities and mountainous areas. In this case\, the radiation environment is influenced by radioactive gases (radon\, thoron) \, together with their decay products\, and radioactive aerosols formed in natural chains of uranium and thorium series. Thus\, one of the most impo rtant tasks of radioecological research is the analysis of radon concentra tion in residential and public buildings. Radon enters the building from t he ground\, through foundations and floors\, or directly from building mat erials. As a result\, a rather high radiation background can be registered in the building. Especially if the house has the high concentration of ur anium-thorium series radionuclides\, or if materials with a high uranium c oncentration were used in its construction. Also\, if there is a positive temperature difference inside and outside the building\, a pressure gradie nt arises and an additional mechanism appears that contributes to the entr y of radon. This mechanism is usually much more important than the diffusi on transfer of radon [1].\nTherefore\, it seems to be interesting to study the concentrations of radon and its decay products in residential and adm inistrative buildings\, and especially in newenergy-efficient buildings [2 ]. In present work\, the objects of research were buildings located in the foothill regions of the Tien Shan (Almaty region)\, because tectonic faul ts and the rocks are additional sources of radon. On the other hand\, it w ould be interesting to compare experimental data on radon concentration ob tained in buildings located in mountainous areas with data obtained in bui ldings built in the Prinevskaya lowland area (with the corresponding geolo gical structure) at the zero mark of the height and depth reference system ( region of St. Petersburg).\nIn this work\, data on radon volume activit y were obtained and analyzed in the period from February 2021 to February 2022 in housing and public buildings of Almaty and St. Petersburg. As a re sult\, the radon concentration distributions were obtained at all levels o f administrative and residential buildings. The dependences of radon volum e activity on temperature\, humidity and pressure were analyzed. Also\, in some local places the high radon volume activity was detected. Such radon «jets» can add an additional radiation load to the total exposure dose for the population from natural radiation sources. \nThis research has bee n funded by the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan (Grant No. AP09258978).\n\n 1. V.I. Zherebc hevsky\, N.A\, Maltsev\, «Measurement of the content of radon and thoron in samples»\, SPb .: VVM Publishing House\, ISBN 978-5-9651-1299-9\, 2020 .\n 2. Yarmoshenko\, I.V.\, Onishchenko\, A.D.\, Malinovsky\, G.P. et al. Radon concentration in conventional and new energy efficient multi-storey apartment houses: results of survey in four Russian cities\, Nature\, Sci. Rep. 10\, 18136 (2020). https://doi.org/10.1038/s41598-020-75274-4\n\nhtt ps://events.sinp.msu.ru/event/8/contributions/234/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/234/ END:VEVENT BEGIN:VEVENT SUMMARY:Precision measurements of 210Bi β-spectrum for neutrino physics t asks. DTSTART;VALUE=DATE-TIME:20220713T070000Z DTEND;VALUE=DATE-TIME:20220713T072000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-199@events.sinp.msu.ru DESCRIPTION:Speakers: Alexander Derbin (Petersburg Nuclear Physics Institu te NRC KI)\nThe isotope 210Bi is an element of 238U natural decay chain. A s decay product of 222Rn gas and subsequent long-lived 210Pb\, the 210Bi i sotope is present inside and on the surface of all structural materials. A t present\, accurate measurement of 210Bi β-spectrum is necessary for bac kground simulation of modern neutrino and dark matter detectors\, as well as for other low-background experiments. In particular\, the shape of 210B i β-spectrum is very similar to the spectrum of recoil electrons from the scattering of solar CNO-neutrinos. \n The β-spectrum was measured with t wo types of Si-spectrometers developed and manufactured at the PNPI. To re gister electrons in a spectrometer designed according to the classical "ta rget-detector" scheme\, a Si(Li) detector 15 mm in diameter and 7 mm thick was used [1]. The main difference of the new 4πβ- spectrometer is the r esponse function\, which is close to Gaussian\, which does not require car eful consideration of electron backscattering from the crystal surface [2\ ,3]. As a result of two independent measurements\, the values of the nucle ar form factor parameters are determined with an accuracy better than a pe rcent and are consistent with each other.\n\n1. Alekseev I.E.\, Bakhlanov S.V.\, Derbin A.V.\, Drachnev I.S.\, Kotina I.M.\, Lomskaya I.S.\, Muratov a V.N.\, Niyazova N.V.\, Semenov D.A.\, Trushin M.V.\, Unzhakov E.V.\, Phy s. Rev. C 102\, 064329 (2020).\n2 Alekseev I.E.\, Bakhlanov S.V.\, Derbin A.V.\, Drachnev I.S.\, Kotina I.M.\, Lomskaya I.S.\, Muratova V.N.\, Niyaz ova N.V.\, Semenov D.A.\, Trushin M.V.\, Unzhakov E.V. J. Phys.: Conf. Ser . 2103\, 012144 (2021).\n3. Bakhlanov S.V.\, Derbin A.V.\, Drachnev I.S.\, Kotina I.M.\, Lomskaya I.S.\, Muratova V.N.\, Niyazova N.V.\, Semenov D.A .\, Trushin M.V.\, Unzhakov E.V.\, Chmell E.A. Instrum. Exp. Tech.\, 64\, 190 (2021).\n\nhttps://events.sinp.msu.ru/event/8/contributions/199/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/199/ END:VEVENT BEGIN:VEVENT SUMMARY:A LINEAR ELECTRON ACCELERATOR – TOP-UP INJECTOR FOR THE 4TH GENE RATION SPECIALIZED SYNCHROTRON RADIATION SOURCE USSR DTSTART;VALUE=DATE-TIME:20220713T070000Z DTEND;VALUE=DATE-TIME:20220713T072000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-236@events.sinp.msu.ru DESCRIPTION:Speakers: Ilia Ashanin (NRNU MEPHI)\nemphasized textThe 4th ge neration synchrotron light source called Ultimate Source of Synchrotron Ra diation (USSR-4) is under development at the moment in Russia [1]. Paramet ers of X-ray radiation of advanced modern Synchrotron Radiation Sources – brightness\, coherence and temporal resolution – make it possible to provide experiments to study the structure of the widest range of objects in a variety of disciplines at a qualitatively new level compared to prev ious generation’s sources. New 4th generation source design will be the one of the largest world scientific centers and will require the innovatio ns and evolution in the domestic technologies of magnetic and vacuum syste ms\, the solution of new problems in materials science and instrument engi neering. \nGeneral facility layout includes 6 GeV main storage ring and a linac for top-up injection. Thus\, it is proposed to use the same linac wi th two RF-guns. First of them will RF photogun and can be used to generate the drive beam for FEL. The second one will RF-gun with thermionic cathod e can be used for injection into storage ring. Both injectors will operate with the same regular part of the linac which consists of 110 identical r egular sections (see Fig. 1). The planning to have the transverse emittanc e of 70 pm·rad for the storage ring and less than 1 nm∙rad for a FEL. \ n\n \nFig. 1. Layout scheme of the 6 GeV top-up injection linac.\n\nDevelo pment of a general layout of the top-up linac with the aim to minimize of the beam energy spread and transverse emittance at the exit\, optimization of geometrical and electrodynamical parameters of accelerating structures and analysis of the front-to-end beam dynamics in this linear accelerator will discuss in the report. All results of the beam dynamics simulation c arried out using the BEAMDULAC package developed at the Department of Elec trophysical Facilities of NRNU MEPhI [2].\n\n1. V.S. Duybkov et al\, Proc. of RuPAC’2021\, TUPSB26 (2018)\, pp. 280-282.\n2. E. Masunov\, S. Poloz ov\, Nucl. Instrum. Meth. A 558\, (2006)\n\nhttps://events.sinp.msu.ru/eve nt/8/contributions/236/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/236/ END:VEVENT BEGIN:VEVENT SUMMARY:The Regge meson spectrum from holographic Wilson confinement crite rion DTSTART;VALUE=DATE-TIME:20220713T074000Z DTEND;VALUE=DATE-TIME:20220713T080000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-630@events.sinp.msu.ru DESCRIPTION:Speakers: Timofey Solomko (Saint-Petersburg State University)\ nUsing the Wilson confinement criterion\, a holographic model for finding a string-like spectrum of meson excitations is proposed. The model is appl ied to the vector and scalar mesons and a good agreement is obtained both with the existing experimental data and with some other known phenomenolog ical approaches. The constructed model provides a novel realization of spo ntaneous chiral symmetry breaking between parity partners.\n\nhttps://even ts.sinp.msu.ru/event/8/contributions/630/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/630/ END:VEVENT BEGIN:VEVENT SUMMARY:QUARK-GLUON STRING MODEL (QGSM) AND ITS APPLICATION FOR INELASTIC DC INTERACTIONS AT A MOMENTUM OF 4.2 A GEV/S DTSTART;VALUE=DATE-TIME:20220713T070000Z DTEND;VALUE=DATE-TIME:20220713T072000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-249@events.sinp.msu.ru DESCRIPTION:Speakers: raxmatillo bekmirzaev (nurmurodovich)\nQUARK-GLUON S TRING MODEL (QGSM) AND ITS APPLICATION FOR INELASTIC DC INTERACTIONS AT A MOMENTUM OF 4.2 A GEV/S\n\nR. Bekmirzaev1\, M.U.Sultanov2\, S. Yuldashev3\ n\n 1State Pedagogical Institutes\, 130100\, Jizzakh\, Uzbekistan\nbekmirz aev@mail.ru\n2State Architecture and Civil Engineering Institute\, Samarka nd\, Uzbekistan \n3Samarkand State University\, Samarkand\, Uzbekistan\n\n The construction of high-energy accelerators for hadrons and the creation of detectors that record reaction products are very costly. At the same ti me\, there is a need to compare the experimental conditions and large-scal e experimental data with the results of theoretical calculations. As a res ult\, a large number of software generators for the collisions of hadrons and nuclei of different energies have emerged. These programs are based on a standard model (various phenomenological models) of strong and non-elec tric interactions. Of these\, ISAJET and Lund University programs\, includ ing PYTHIA and FRITIOF\, are popular. These programs open up almost all ar eas of transmitted momentum (P2\, quarks and from strong scattering of glu ons to the formation and decay of hadrons). In this work\, the main provi sions of the Quark-gluon string model for describing inelastic interaction s of light nuclei at high energies are presented. The main ideas of the CG SM model are given\, such as the process of formation of quark-gluon strin gs and the choice of their limited number\, modeling of string breaking wi th the formation of hadrons [1]. The data of theoretical calculations by C GSM are compared with the experimental results obtained for dC-inelastic i nteractions. The technique for obtaining experimental data is briefly desc ribed. Analysis and comparison of model and experimental information shows that the CGSM model reproduces well the interactions of light colliding n uclei at energies of 4.2 GeV/s\, and it is applicable up to the energy of nuclear interactions of 10 GeV/nucleon [2-3]. Low experimental data on 4π geometry were obtained. Therefore\, it is important to study the formatio n of cumulative particles in large experimental statistics. \nReference\n 1. Feynman R.P.\, Field R.D. Nucl.Phys. V.B136\, (1978). p.1.\n2. Olimov\ , K. et al. Reports of Uzbek Academy of Sciences 29\, 4 \, (2011) \n3. O limov\, K. et al.\, International Journal of Modern Physics E\, 29\, 4 ( 2020).\n\nhttps://events.sinp.msu.ru/event/8/contributions/249/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/249/ END:VEVENT BEGIN:VEVENT SUMMARY:TRANSVERSE MOMENTUM FLUCTUATIONS IN NICA AND SPS ENERGY RANGE DTSTART;VALUE=DATE-TIME:20220713T072000Z DTEND;VALUE=DATE-TIME:20220713T074000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-395@events.sinp.msu.ru DESCRIPTION:Speakers: A. P. Zviagina ()\nCorrelations between multiplicit y of charge particles and mean transverse momentum were observed experimen tally in p+p collisions from top SPS energy to LHC energy. The change in t he correlation function’s shape with collision energy was successfully d escribed by the multi-pomeron exchange model as an interplay of string fus ion and energy-momentum conservation [1]. Previously\, it was shown that p henomenological resonance-to-strings transition leads to rapid changes in the magnitude of pt-n correlations at the NICA energy range [2]. The mean transverse momentum is sensitive to the initial energy density [3] and\, t herefore\, its event-by-event fluctuations are strongly affected by the ev ent (centrality) selection. In this contribution results of the pt-n corre lations analysis [2] would be extended by Monte-Carlo simulations studies for the pt-n strongly intensive observables [4]\, pt cumulants [5] and two -particle pt correlation measures [6]. That would allow testing the influe nce of the resonance-to-string transition and the role of conservation law s of the given observables.\n\n1. N. Armesto\, D. A\, Derkach\, and G. A. Feofilov\, Phys. Atom. Nucl. 71\, 2087 (2008).\n2. A. Zvyagina\, E. Andron ov\, Phys. Part. Nucl. 53(2)\, 117 (2022).\n3. E. V. Shuryak\, Phys. Lett. B 423\, 9 (1998).\n4. M. Gorenstein\, M. Gazdzicki\, Phys. Rev. C 84\, 01 4904 (2011).\n5. S. Bhatta\, C. Zhang\, and J. Jia\, Phys. Rev. C 105 (2)\ , 024904 (2022).\n6. M. Cody et al.\, arXiv:2110.04884 [nucl-th].\n\nhttps ://events.sinp.msu.ru/event/8/contributions/395/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/395/ END:VEVENT BEGIN:VEVENT SUMMARY:Agility multileaf collimator parameters optimization in the indepe ndent dose calculation system DTSTART;VALUE=DATE-TIME:20220713T082000Z DTEND;VALUE=DATE-TIME:20220713T083000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-287@events.sinp.msu.ru DESCRIPTION:Speakers: Anna Loginova (Dmitry Rogachev National Research Cen ter of Pediatric Hematology\, Oncology and Immunology\, Moscow\, Russia)\n The MIM SureCalc® is MonteCarlo Plan verification system (MIM Software In c. Clevland\, OH\, USA) used to provide an independent dose calculation ca lculation check of radiotherapy treatment plans. These module include a vo xel based Monte Carlo engine to calculate the dose in the patient. The inp ut data are DICOM RT Image\, RT Structure and RT dose derived from treatme nt planning system. The algorithm uses virtual source models\, which are a nalytically expressed phase space models generated from BEAMnrs [1]. The m odel of the linac is created by the software manufacturer based on the dat a provided by the users (depth dose distributions\, beam profiles\, and ra diation output factors)\nThe aim of this study was to assess the MIM SureC alc® MonteCarlo Plan verification module and optimize the calculation par ameters according the measured data obtained using Elekta linear accelerat or equipped with Agility™ multileaf collimator (MLC).\nThe modeling accu racy of MLC was assessed by comparing the calculated and measured dose dis tributions in L-shaped test radiation fields (four bordering segments in t he form of the letter “L”). The measurements were performed with the m assive of ionization chambers MatriXX (IBA Dosimetry). The modeling of the MLС offsets (the difference between the given leaf position and its actu al value)\, as well as the leaf groove values (characteristic of the field edge formed by the side surfaces of the MLC leaf) was evaluated using Gam ma analysis [2].\nThe optimization began with all parameters set to their default value. Comparison of the calculated test fields with the measureme nts showed that correction of the leaf groove leakage and offset values ar e required. The offset value of 0.1 mm was selected that best replicated m easurements with the Agility™ MLC. Correction of leakage values was poss ible only by changing the virtual source model and required additional act ions from the manufacturer.\nThe adjustment of the above parameters result ed in improved 2D Gamma of 2% 1 mm analysis passing rates up to 98.0% when applying the global and 95.2% when applying the local normalization.\nThe appropriate optimization of MLC parameters responsible for the properties of a particular device makes it possible to achieve high accuracy in MIM SureCalc® MonteCarlo Plan calculation.\n\n1. Rogers DW\, Faddegon BA\, Di ng GX\, Ma CM\, We J\, Mackie TR. BEAM: a Monte Carlo code to simulate rad iotherapy treatment units. Med Phys.—1995.—V.22.—P.503-24\n2. Daniel A. Low\, William B. Harms\, Sasa Mutic\, James A. Purdy A technique for t he quantitative evaluation of dose distributions // Med. Phys.—1998.—V .25.— P.656-661\n\nhttps://events.sinp.msu.ru/event/8/contributions/287/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/287/ END:VEVENT BEGIN:VEVENT SUMMARY:Preliminary data of the experiment to determine the cluster struct ure of the excited states of the 6Li DTSTART;VALUE=DATE-TIME:20220713T081000Z DTEND;VALUE=DATE-TIME:20220713T083000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-218@events.sinp.msu.ru DESCRIPTION:Speakers: Michael Mordovskoy (INR RAS)\nA test experiment to d etermine the cluster structure of the excited states of the 6Li nucleus in the n + 6Li reaction with registration of charged particles and neutrons in coincidence was carried out on the RADEX neutron channel of INR RAS. Ch arged particles were registered by a telescope of silicon ∆E-E detectors at an angle of 50º in a small vacuum scattering chamber with a mounted 6 Li2CO3 target [1]. Neutrons were registered by three scintillation detecto rs at an angle of 80º on the other side of the beam axis. Preliminary dat a on the energy spectra of neutrons and charged particles have been obtain ed. The obtained data make it possible to estimate the beam time required to obtain statistically reliable data for studying the cluster structure o f highly excited states of the 6Li nucleus.\n\n1. A. Kasparov\, M. Mordovs koy\, V. Mitcuk\, A. Afonin // “Nucleus-2021”\, Book of Abstracts\, 89 (2021).\n\nhttps://events.sinp.msu.ru/event/8/contributions/218/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/218/ END:VEVENT BEGIN:VEVENT SUMMARY:THE MEASUREMENT OF THE LOW LEVELS OF RADIOACTIVITY BY LIQUID SCINT ILLATION ALPHA AND BETA SPECTROMETER QUANTULUS 1220 DTSTART;VALUE=DATE-TIME:20220713T072000Z DTEND;VALUE=DATE-TIME:20220713T074000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-240@events.sinp.msu.ru DESCRIPTION:Speakers: Konstantin Gruzdov ()\nThe Quantulus 1220 is a liqui d scintillation counting (LSC) system for the quantitative measurement of extremely low levels of alpha and beta activity. With both passive and act ive shielding\, the Quantulus 1220 employs a universal background reductio n system which is optimized according to type of analysis.\nThe active shi elding is the asymmetric liquid scintillator guard. The active shielding i s used in anticoincidence with the analogue to digital converter (A/D conv erter). This means that if the guard registers a signal simultaneously wit h a coincidence signal in the detector the guard detector will inhibit the A/D conversion.\nIn the Centre of Isotopic Research (CIR) of FGBU "VSEGEI " Quantulus 1220 is used for radiocarbon (14C) dating of various organic o bjects (wood\, peat\, soil\, bottom sediments\, bones)\, dating young bott om sediments using 210Pb as well as determination the tritium content in w ater.\nThe minimum detectable concentration of tritium in water is approxi mately 1 Bq/L.\nThe obtained results are presented as the alpha and beta d ecay spectra of radioactive isotopes with calculations of the specific act ivities and radiocarbon ages.\n\nhttps://events.sinp.msu.ru/event/8/contri butions/240/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/240/ END:VEVENT BEGIN:VEVENT SUMMARY:INTERACTION OF SERUM ALBUMIN AND GRAPHENE OXIDE: INVESTIGATION BY TRITIUM PROBE AND MOLECULAR DOCKING DTSTART;VALUE=DATE-TIME:20220713T081000Z DTEND;VALUE=DATE-TIME:20220713T083000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-295@events.sinp.msu.ru DESCRIPTION:Speakers: Vitalii Bunyaev (Moscow State University\, Radiochem istry Department of Chemistry Faculty)\nGraphene oxide (GO) modification w ith different compounds for synthesis of new materials with specified prop erties is the field of interest of modern investigation [1]. Since serum a lbumin is the main blood protein\, it is important to understand the mecha nisms of its interaction with medical materials. In present work we propos e a novel complex approach of studying interactions between bovine serum a lbumin (BSA) and GO. The approach includes tritium probe method and comput er simulation.\nTritium probe method is based on the application of tritiu m labeled compounds for the to determine the composition of composite mate rials\, as well as to determine the structural organization of protein mol ecules on the surface of a solid substrate [2].\nBSA was adsorbed on the s olid of an aqueous suspension of GO. The composition of such prepared mate rial was determined with the help of tritium labeled protein. We observed that BSA strongly adsorbs on GO. To reveal the structural peculiarities of protein on GO surface\, the adsorption composite was subjected to bombard ment with atomic tritium following by analysis of label distribution in th e amino acid residues. Tritium atoms were formed from molecular tritium on the tungsten filament heated by the electric current up to 1830 K.\nThe e xperimental results were compared with molecular docking simulation. Molec ular docking was performed using AutoDock Vina 1.2.3\, LeDock and Hex8.0.0 softwires. Preliminary preparation of the carbon substrate model\, minimi zation of the free energy of GO structure\, as well as preparation of prot ein files for calculation were carried out using ChemBioDraw/3D Ultra 11.0 .2.\, UCSF Chimera 1.15 respectively. The molecular modeling was performed tooking into account the presence of structural defects in GO\, the hydra te shell on the surface of the nanocarbon substrate\, as well as the forma tion of a "protein corona" due to protein-protein interactions.\nAs a resu lt\, we determined the composition of BSA-GO adsorption composites in the wide range of protein concentrations. Moreover\, binding sites of BSA and GO have been identified\, and the important role of histidine in protein r etention on the GO surface will be discussed in the presentation.\n\n1. Gu sarova E.A. et al.\, Colloid and Interface Science Communications. 46\, 10 0575 (2022).\n2. Chernysheva M.G. et al.\, Radiochemistry. 63(2)\, 227 (20 21).\n\nhttps://events.sinp.msu.ru/event/8/contributions/295/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/295/ END:VEVENT BEGIN:VEVENT SUMMARY:NEUTRON SCATTERING ANALYS BY LIGHT NUCLEI USED COUPLED CHANNEL OPT ICAL MODEL DTSTART;VALUE=DATE-TIME:20220713T070000Z DTEND;VALUE=DATE-TIME:20220713T072000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-285@events.sinp.msu.ru DESCRIPTION:Speakers: Vladimir Skorkin (INR RAS)\nAt present\, an optical- model analysis of the scattering of nucleons by light nuclei\, which have a cluster structure and collective states\, is used.\n We have calculated the cross sections of fast neutron scattering on even-even nuclei of 1p sh ell used by rotational variants of CCOM. Nuclei with an unfilled 1p-shell are deformed and have a non-uniform nucleon distribution density. \nThe cr oss sections of elastic and inelastic scattering of neutrons by even isoto pes of helium\, beryllium\, carbon\, and oxygen with the excitation of rot ational states of these nuclei were calculated.\n\nhttps://events.sinp.msu .ru/event/8/contributions/285/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/285/ END:VEVENT BEGIN:VEVENT SUMMARY:INVESTIGATION OF CRYSTAL AND MAGNETIC STRUCTURES OF MULTIFFERROIC MATERIAL UNDER HIGH PRESSURE DTSTART;VALUE=DATE-TIME:20220713T072000Z DTEND;VALUE=DATE-TIME:20220713T074000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-289@events.sinp.msu.ru DESCRIPTION:Speakers: Olga Lis (Frank Laboratory of Neutron Physics\, Join t Institute for Nuclear Research)\nMagnetoelectric multiferroics\, where a ferromagnetic and a ferroelectric order coexist and are coupled in a sing le phase\, have been a hot topic in condensed matter physics for a long ti me owing to their ability to facilitate next generation applications. Main ly\, understanding of the magnetoelectric effect in single-phase materials is one of the most exciting and interesting topics of research in the sol id-state physics. Pb(Fe2/3W1/3)O3 (PFWO) belongs to the family of Pb-based multiferroic relaxor ferroelectric complex perovskites (AB′1−xB′′ xO3). It is generally accepted that this material exhibits a disordered pe rovskite structure\, where Fe3+ and W6+ ions are randomly distributed at t he centers of the BO6 octahedra. However\, recently studies have revealed the presence of the set of superlattice reflections\, which indicates some kind of B-cation ordering in PFWO which had been thought to be totally di sordered. It was found that the crystal structure of PFWO should be descri bed by a partly ordered cubic perovskite (i.e. Fm−3m)\, also\, the weak ferromagnetic properties and excess magnetic moment of PFWO can be underst ood based on non-random distribution of Fe cations between the 4a and 4b s ites. Despite intensive studies\, understanding the exact nature of its mu ltifunctional properties of PFW has remained a challenge for decades. The knowledge of relationship between magnetic and crystal structure of such c ompounds\, which can be obtained from high-pressure investigations\, is ve ry essential for understanding the nature and mechanism of physical phenom ena observed in it. In addition\, the detail studies of structural changes under extreme conditions were not carried out.\nIn present work was perfo rmed neutron diffraction studies of PFWO at high pressures and low tempera ture. Neutron powder diffraction measurements at high pressures up to 7 GP a were performed with the DN-12 diffractometer at the IBR-2 high-flux puls ed reactor [FLNP\, JINR\, Dubna\, Russia] using the sapphire anvil high-pr essure cell. In order to improve the understanding of the lattice instabil ities the Raman spectroscopy studies of the vibration spectra of the compo und under pressure up to 30 GPa were performed. The crystal structure of t his compound also has been studied by X-ray diffraction at high pressures. Pressure dependences of the volume\, unit cell parameters and of magnetic moments of antiferromagnetic (AFM) phase\, Neel temperature were also cal culated. With increasing temperature and pressure\, slight decreasing of t he magnetic moments of iron ions in PFWO were observed\, however\, althoug h the crystal structure remains stable up to high pressures with a space g roup Pm-3m. Some Raman modes have been found on the Raman spectra\, which in such compounds are correlated with the existence of nanoregions\, howev er\, with increasing pressure\, these modes noticeably widen and vanish.\n The work was supported by the JINR Grant for young scientists 22-402-03.\n \nhttps://events.sinp.msu.ru/event/8/contributions/289/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/289/ END:VEVENT BEGIN:VEVENT SUMMARY:TOF MEASUREMENT OF LOW-ENERGY NEUTRON SCATTERING BY DEFORMED NUCLE I DTSTART;VALUE=DATE-TIME:20220713T081000Z DTEND;VALUE=DATE-TIME:20220713T083000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-292@events.sinp.msu.ru DESCRIPTION:Speakers: Vladimir Skorkin (INR RAS)\nThe measurement of cross sections for neutron scattering by deformed nuclei in the energy range fr om 1 keV to 3 MeV is possible on the time-of-flight (TOF) channel of a pul sed neutron source based on a linac proton beam trap. The use of a beam wi th a duration of 0.3 μs will make it possible to measure neutron cross se ctions in this energy range with a resolution of (1–30)% over a 50 m spa n. Using elastic neutron scattering on W sample\, the neutron spectrum was measured in the TOF channel of a pulsed source at an accelerator beam cur rent of 1 μA \nMeasurement of the inelastic neutron scattering cross sect ion at the threshold of excitation of rotational states of deformed nuclei up to 0.5 MeV is relevant for nuclear power engineering. When calculating the dynamics of nuclear reactors\, it is necessary to take into account t he energy dependence of the neutron strength functions of nonspherical nuc lei\, which can be determined from the measured total cross sections in th e range from 1 keV to 2 MeV.\n\nhttps://events.sinp.msu.ru/event/8/contrib utions/292/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/292/ END:VEVENT BEGIN:VEVENT SUMMARY:FOURIER-IR SPESTROSCOPIC STUDIES OF n-C6H14 AND n-C6H14 + H2O SYST EMS DTSTART;VALUE=DATE-TIME:20220713T072000Z DTEND;VALUE=DATE-TIME:20220713T074000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-297@events.sinp.msu.ru DESCRIPTION:Speakers: Sevinj Melikova ()\nRadiation-catalytic processes fo r the production of molecular hydrogen from a mixture of hexane and hexane -water It is of great interest to discover new ways of conversion and use of ionizing radiation for the production of molecular hydrogen\, which is a universal energy carrier. The results of the research may be important t o clarify the mechanism of the processes that occur under experimental con ditions under the influence of ionizing radiation in the hexane\, hexane-w ater system\, as well as under natural conditions in oil and gas fields un der the influence of natural radionuclides.\nIn the presented work\, Fouri er-IR spestroscopic studies of n-C6H14 and n-C6H14 + H2O systems were perf ormed. The results of spectroscopic studies suggest that the ratios of the intensities of the absorption bands characterizing the CH2\, CH3 groups v ary depending on the dose rate (valence and deformation oscillations of CH 2 and CH3 are 2800 - 2970 cm-1 and 1300 - 1500 cm-1\, respectively. 1 are located in the spectral regions). Absorption bands - (CH2) belong to the l ong chain type of type n (n4) and CH2 lattice oscillations (spectral re gion  = 650 - 850 cm-1). During radiolysis of the n-hexane + water syst em (3:1) after gamma radiation\, 5 new bands are observed in the frequency range  = 2600 - 2700 cm-1\, which indicates that the decomposition of n-hexane produces heavier paraffin during radiation-chemical processes. - The change and distribution of the maximums and intensities of absorption bands in the chain region of (CH2) ( = 650 - 850 cm-1) indicates the fo rmation of paraffins of type C1 - C5. The formation of C1 - C5 products is confirmed by the spectra of gases in the system under study. The decompos ition of water in the studied system is followed by the formation of absor ption bands of OH-groups in the spectra in the frequency range  = 3000 - 3600 cm-1 (valence region)\,  = 1700 - 1600 cm-1 (deformation region) . The formation of olefins as a result of radiolysis of the n-hexane + wat er (3:1) system was not observed in the IR spectra.\n\nhttps://events.sinp .msu.ru/event/8/contributions/297/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/297/ END:VEVENT BEGIN:VEVENT SUMMARY:DETERMINATION OF THE ASYMPTOTIC NORMALIZATION COEFFICIENTS FOR $^7 $Li+p→$^8$Be FROM THE PERIPHERAL DIRECT CAPTURE $^7$Li(p\,γ)$^8$Be REA CTION AND THE ASTROPHYSICAL S FACTOR AT LOW ENERGIES DTSTART;VALUE=DATE-TIME:20220713T072000Z DTEND;VALUE=DATE-TIME:20220713T074000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-304@events.sinp.msu.ru DESCRIPTION:Speakers: Kakhramon Tursunmakhatov (Institute of Nuclear Physi cs\, Academy Sciences of Uzbekistan)\nThe reaction $^7$Li(p\,$\\gamma$)$^8 $Be is part of the pp-chain in the Sun\, leading to the formation of $^8$ Be. In the present work\, the analysis of the experimental astrophysical S factors S$^{exp}$(E) for the nuclear-astrophysical $^7$Li(p\,$\\gamma$)$^ 8$Be reaction in the off-resonance energy region measured in [1] are perfo rmed within the modified two body potential approach [2]\, and assuming t hat\, in this energy region ($E\\le200$ keV) radiative proton capture by $ ^7$Li nucleus is direct.\nThe method involves two additional conditions th at verify the peripheral character of the direct radiative capture reactio n $^7$Li(p\,γ)$^8$Be in the off-resonance energy region: 1) $R(E\,b)=cons t$ for arbitrary variation of the single particle asymptotic normalization coefficient b for each fixed experimental value of the energy $E$\; 2) th e ratio $C_{p^7Li}^2=S^{exp}(E)⁄R(E\,b)$ must not depend neither from $b $ and nor from the energy $E$ for each experimental point of the energy ($ E$=98.3\, 147.6 and 198.3 keV)\, where $R(E\,b)=S^{(sp)}(E)⁄b^2$ in wh ich $S^{(sp)}(E)$ is a single-particle astrophysical $S$ factor. Fulfillm ent of the conditions above\, it allows to determine “experimental” va lues of ANCs $C_{p^7Li}^2 [=(C_{p^7Li}^{exp})^2]$ for ground and first exc ited states of $^8$Be with their uncertainty. The obtained values of ANCs $(C_{p^7Li}^{exp})^2$ can be used in the expression $S(E)=(C_{p^7Li}^{exp })^2 R(E\,b)$ for obtaining the extrapolated values of $S(E)$ and its unce rtainties within the energy range $E< 98.3$ keV\, including $E=0$.\nVariat ion of values of the parameters of the Woods-Saxon potential $r_0$ and $a$ is done in the wide range ($1.1\\le r_0 \\le 1.4$ fm\, $0.59\\le a \\le 0 .72$ fm) and it is shown that the reaction is strongly peripheral. As a re sult\, the new values of ANCs $(C_{p^7Li}^{exp})^2$ with their uncertainti es for $^7$Li+p→$^8$Be were obtained. The obtained values of ANCs are us ed for calculation of the astrophysical S factor of the radiative resonanc e capture $^7$Li(p\,$\\gamma$)$^8$Be reaction within the modified R-matrix method [3]. \n\n1. D. Zahnow\, C.Angulo\, C.Rolfs\, S.Schmidt\, and et al .\, Z. Phys. A 351\, 229-236 (1995).\n2. S.B. Igamov and R.Yarmukhamedov\, Nucl. Phys. A 673\, 509 (2007).\n3. K.I. Tursunmakhatov\, R.Yarmukhamedov and S.B.Igamov\, EPJ Web of Conf. 227\, 02016 (2019).\n\nhttps://events.s inp.msu.ru/event/8/contributions/304/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/304/ END:VEVENT BEGIN:VEVENT SUMMARY:A METHOD OF GAMMA-SPECTRUM PROCESSING BASED ON EXPONENTIAL SMOOTHI NG DTSTART;VALUE=DATE-TIME:20220713T074000Z DTEND;VALUE=DATE-TIME:20220713T080000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-307@events.sinp.msu.ru DESCRIPTION:Speakers: Leonid Minin (Voronezh State University)\nThis paper proposes a new method to smooth out the spectral gamma-lines. Calibration samples supplied with the gamma spectrometer containing radioactive isoto pes Eu152\, Co60 and Na22were used as test objects. The position\, width a nd area of the peaks obtained as a result of spectrometry characterize the energy and intensity of gamma radiation. As is known\, these peaks are su perimposed on a continuous spectrum of energy resulting from secondary eff ects and background radiation [1].\nThe smoothing procedure was performed using interpolation by the system of uniform shifts of the Gaussian functi on [2]:\n \nSince the standard interpolation procedure becomes highly unst able with increasing variance [3]\, regularization was applied. Results of the simulation indicate that the proposed method for filtering spectral l ines does not introduce distortions into the original signal. On the other hand\, the representation of spectral lines as a linear combination of Ga ussian function shifts provides an additional opportunity for analytical c alculations with a given signal during subsequent more detailed processing .\nIt is not necessary to pick the form of the peaks because they are repr esented as a sum of several shifts of the Gauss function with various ampl itudes. As a result\, a more versatile peak detection system has been obta ined that does not require serious changes from one type of signal to anot her. A feature of the proposed method is that the peak areas for the origi nal and smoothed signal may differ by around 10%\, but with a significant change in the variance of the regularization parameter the area change s are small\, which ensures the calculation robustness.\n\n1. R. Gordon Gi lmore .Practical Gamma-ray Spectrometry.2nd Edition. –Nuclear Training Services Ltd\, John Wiley &Sons \, Warrington\, UK\, 2008.\n2. V.Maz'ya\, G. Schmidt\, AMS Mathematical Surveys and Monographs\, 141\, 350 (2007).\ n3. E.A.Kiselev\, L.A.Minin\, I.Y.Novikov and S.M.Sitnik\, Math. Notes 96\ , 228\, (2014).\n\nhttps://events.sinp.msu.ru/event/8/contributions/307/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/307/ END:VEVENT BEGIN:VEVENT SUMMARY:Computer Simulation of PFN Detector DTSTART;VALUE=DATE-TIME:20220713T080000Z DTEND;VALUE=DATE-TIME:20220713T082000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-309@events.sinp.msu.ru DESCRIPTION:Speakers: Olga Sidorova (Joint Institute for Nuclear Research) \nPFN emission of 235U(n\,f) reaction are under investigation in JINR for last 20 year. The recent achievements in experimental apparatus simulation are the subject of this presentation. The object of simulation is prompt fission neutron (PFN) detector used for resonance neutron induced fission of U-235. The neutron source was IREN facility and double ionization chamb er (DIC) with Frisch grids was used for fission fragment spectroscopy. The PFN detector was multi detector system consisted of 32 BC501 scintillatio n liquid filled modules from the Sionix (Netherlands) company. Detectors were located on the sphere surface with 50 cm radius. Double Frisch gridde d ionization chamber\, used as fission spectrometer at the same time gener ated trigger signal for PFN registration apparatus. For each fission event the following simulated information was recorded: correlated fission frag ments time mark\, emission angle in respect to the selected coordinate fra mes along with the pulse heights and shapes of neutron detector signals. M ultiple neutron scattering and the cross-talks were taken into account in order to evaluate contribution of those effects in the final results.\n\nh ttps://events.sinp.msu.ru/event/8/contributions/309/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/309/ END:VEVENT BEGIN:VEVENT SUMMARY:Computer modeling of ttH Higgs boson production process in the fra mework of MSSM model DTSTART;VALUE=DATE-TIME:20220713T081000Z DTEND;VALUE=DATE-TIME:20220713T083000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-612@events.sinp.msu.ru DESCRIPTION:Speakers: Tetiana Obikhod ()\nThe properties of the MSSM Higgs bosons\, h and H\, through the comparison with the actual experimental da ta were studied. For such appropriate investigation ATLAS data of the cro ss sections of Higgs boson decay into b-quarks were considered. In the fra mework of theoretical research of modeled process the tree-level Higgs sec tor described by two parameters M$_A$ and tan$\\beta$ was used and their o ptimal values were found. Using the restricted parameter space we calculat ed cross sections of associated tth(H) production at 13 and 14 TeV\, the c orresponding kinematical cuts\, mass distributions and Branching Ratios of h and H decays into bb quark pair.\n\nhttps://events.sinp.msu.ru/event/8/ contributions/612/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/612/ END:VEVENT BEGIN:VEVENT SUMMARY:Is Electroweak Interaction – a Kind of Cosmological Lambda Term in Maintaining Nuclear Existence and Stability? DTSTART;VALUE=DATE-TIME:20220713T081000Z DTEND;VALUE=DATE-TIME:20220713T083000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-613@events.sinp.msu.ru DESCRIPTION:Speakers: Seshavatharam UVS (I-SERVE\, Survey no-42\, Hitech c ity\, Hyderabad-84\,Telangana\, India)\nConsidering the interaction scheme associated with Up quarks\, Down quarks and pions and interaction scheme associated with electroweak bosons\, we have developed a new model of nucl eus. We would like to emphasize the point that atomic nucleus cannot exist without the support of electroweak interaction. Clearly speaking\, analog ous to the cosmological Lambda term\, electroweak interaction helps in mai ntaining the existence of atomic nucleus without collapsing due to strong interaction. Interesting points to be noted are: 1) Up quark and Down quar k play a vital role in understanding nuclear structure. 2) Mass ratio of p ions and weak bosons is 0.0016 and it is approximately twice the product o f Fine structure ratio and strong coupling constant. 3) Twice the proton n umber and the coefficient 0.0016 play a significant role in understanding nuclear stability line. 4) Currently believed harmonic oscillator coupling and spin-orbit coupling seem to be a natural manifestation of Up and Down quark arrangement. 5) Number range associated with harmonic oscillator co upling and spin-orbit coupling can be considered as a representation of ma ss number range of a proton number having magic behaviour. 6) Coefficient of proportionality being 0.0016\, number of free nucleons increases with h alf the sum of squared number of protons and squared number of nucleons. 7 ) Increasing number of free nucleons\, increasing nuclear radii and increa sing asymmetry about stable mass number play an important role in reducing nuclear binding energy. 8) Nuclear binding energy can be addressed with f our simple terms and single energy coefficient. 9) Unified nuclear binding energy coefficient is associated with the average rest energy of 3 Up qua rks and 3 Down quarks. 10) Nuclear stability line\, proton drip lines and neutron drip lines can be understood in a unified approach.\n\nhttps://eve nts.sinp.msu.ru/event/8/contributions/613/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/613/ END:VEVENT BEGIN:VEVENT SUMMARY:Test experiment to determine the time distribution of the backgrou nd between MMF accelerator pulses on the RADEX channel. DTSTART;VALUE=DATE-TIME:20220713T081000Z DTEND;VALUE=DATE-TIME:20220713T083000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-313@events.sinp.msu.ru DESCRIPTION:Speakers: Michael Mordovskoy (INR RAS)\nTo determine the possi bility of studying various cluster structures (for example\, [1]) in light nuclei on the RADEX neutron channel of the MMF INR RAS accelerator\, it i s necessary to carry out a study to measure the background between acceler ator pulses (the level\, composition and time distribution of it). For exa mple\, when searching for the cluster structure of α-4n-α and 8Be-4n in the highly-excited state of 12Be*\, it is necessary to detect charged part icles from the b-decay of 12Be* during its formation in the n + 13C reacti on in the intervals between pulses of cascade neutrons [2]. This will be p ossible with a certain background level and its time distribution.\nThe fi rst experiments of this kind were carried out on the RADEX MMF channel at several pulse durations and frequencies from 1 to 50 Hz. Between the pulse s of the accelerator\, the spectra and time distribution of gamma quanta\, neutrons\, and b-particles were measured. The first measurement results a re presented.\n\n1. Marque's F.M. \, et al. // Phys.Rev. C. 65\, 044006 (2 002).\n2. A. Kasparov\, M. Mordovskoy\, V. Skorkin // “Nucleus-2021”\, Book of Abstracts\, 317 \n (2021).\n\nhttps://events.sinp.msu.ru/event /8/contributions/313/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/313/ END:VEVENT BEGIN:VEVENT SUMMARY:THE DOSE CALCULATION BASED ON CBCT IMAGES FOR LONG TARGET CASES: A PHANTOM STUDY DTSTART;VALUE=DATE-TIME:20220713T081000Z DTEND;VALUE=DATE-TIME:20220713T083000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-315@events.sinp.msu.ru DESCRIPTION:Speakers: Anastasiya Lisovskaya (Dmitry Rogachev National Medi cal Research Center Of Pediatric Hematology\, Oncology and Immunology\, Ra diotherapy Department)\nCone-Beam Computed Tomography (CBCT) images have d ifferent normalization of the Hounsfield Units (HU)\, artifacts and a limi ted field of view. That is all creates difficulties for the CBCT dose reca lculation. In this study we assess the possibility of using several CBCT s ets for replanning or further dose evaluation for long target cases.\nDose s were calculated in the anthropomorphic phantom CIRS ATOM ® using Monte- Carlo algorithm in MIM SureCalc® MonteCarlo (Cleveland\, USA). Planned do se at the CT images (rCT) was considered as reference\, doses at different CBCT images were considered as evaluated. The phantom was scanned with th e standard CT mode (120 kV)\; the targets (Brain and Spinal Cord) were con toured and treatment plan was created. \n![Fig.1. Dose difference between rCT and cCBCT with imbedded HUs correction][1]\nObtained CBCTs for four di fferent regions of the phantom (head\, chest\, abdomen\, and pelvis) were united into one combined series (cCBCT) for futher dose calculation. Also all areas were scanned using the only low-dose CBCT protocol to get anothe r low-dose cCBCT. HU to electron density correction was applied for both c CBCT and low-dose cCBCT\, assigning density to bones and lungs was applied only for low-dose cCBCT. Reference and evaluated dose distributions were compared using gamma criteria of 2 % 1 mm. The number of points that satis fy this gamma-criterion is 87.38 % between rCT and low-dose cCBCT\; 94.08 % between rCT and low-dose cCBCT with assign lungs and bones densities\; 9 6.78 % between rCT and low-dose cCBCT with imbedded correction HUs\; 98.72 % between rCT and cCBCT captured on different protocols corresponding sca n areas with imbedded HUs correction. Plans recalculation using several CB CTs for long targets is difficult but feasible task and provide possibilit ies for adaptive radiotherapy. \n\n\n [1]: https://ibb.co/fSQs3PJ\n\nhttp s://events.sinp.msu.ru/event/8/contributions/315/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/315/ END:VEVENT BEGIN:VEVENT SUMMARY:SIMULATION OF THE FAST READOUT SYSTEM FOR MCP-BASED BEAM-BEAM COLL ISIONS MONITOR FOR NICA EXPERIMENTS DTSTART;VALUE=DATE-TIME:20220713T081000Z DTEND;VALUE=DATE-TIME:20220713T083000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-317@events.sinp.msu.ru DESCRIPTION:Speakers: nikodim makarov (saint-petersburg state university)\ nThe event-by-event selection of nucleus-nucleus interactions with well-de fined initial conditions of the interaction point (IP) location in the exp eriment at NICA collider\, beam-gas collisions suppression\, precise event time definition\, as well as control of luminosity\, are important both f or data collection and for the off-line analysis of the results of upcomin g measurements at JINR. For these purposes\, the compact Fast Beam-Beam Co llisions Monitor (FBBC) based on the micro-channel plates (MCPs) was propo sed recently in [1]. Position and time sensitive\, multi-anode MCP detecto rs allow to get\, for each bunch crossing\, the information on the IP coor dinate\, on the multiplicity and of arrival times of charged particles for med in the collision.\n In the present work\, we estimate both the capabil ities of the fast\, precise timing measurements scheme and\, in addition\, of the collision centrality determination in AA collisions. The scheme is based on the method of delayed coincidences using high-speed comparators. We carried out the modeling of the system prototype within the framework of the Quartus [2] environment. Results allow us to state that it is possi ble to determine the response time of the detector with an uncertainty of about 50 ps. Using the coincidence schemes will make it possible to identi fy the number of spectators and\, based on the processing of timing inform ation\, to make conclusions about the centrality of interaction in each ev ent. \n The estimated speed of the analysis scheme is less than 20 ns per each event. This allows us to propose this FBBC readout system\, based on the high-speed comparators\, as the fast\, bunch-by-bunch crossing pre-tri gger\, both in terms of the IP position and the class of centrality.\nThis research has been conducted with financial support from St. Petersburg St ate University (project No 93025435).\n\n1. A.A. Baldin et al.\, Nucl. Ins trum. & Meth. A. 958 . 162154 (2020).\n2. Intel Quartus Prime Design Softw are\, https://www.intel.ru/content/www/ru/ru/software/programmable/quartus -prime/overview.html\n\nhttps://events.sinp.msu.ru/event/8/contributions/3 17/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/317/ END:VEVENT BEGIN:VEVENT SUMMARY:A NEW OUTLOOK ON THE SQUARE-WELL POTENTIAL APPROACH FOR ASTROPHYSI CAL FUSION REACTION DTSTART;VALUE=DATE-TIME:20220713T081000Z DTEND;VALUE=DATE-TIME:20220713T083000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-302@events.sinp.msu.ru DESCRIPTION:Speakers: Sergey Torilov (St. Petersburg State University)\nLa test achievements in experimental study of light nuclei fusion reactions r elevant for nuclear astrophysics in the deep subbarrier region required th e development of models that make it possible to describe the reaction cro ss section at low energies [1]. Today there is no unified approach to desc ribe such reactions: a) with excluding of the potential choice ambiguity [ 2]\; b) with the description of the resonant nature of the cross section [ 3] and its hindrance for low energies [1]. \nAs a first approach we can co nsider the square-well potential\, which allows a simple analytical expres sion to determine the transmission coefficients and hence the reaction cro ss section. As was shown in [4]\, this model gives us the possibility to d escribe the fusion cross section in the low-energy region for 16O + 16O nu clei with sufficient accuracy.\nIn present work\, the square-well model wa s applied to the light nuclei (10B\, 12C\, 14N\, 16O\, 18O\, 20Ne) fusion reactions important for nuclear astrophysics. Functional dependences for t he potential depth and well’s radius were obtained. Artifacts associated with abruptly changed shallow potential well: overestimations of the chan nel radius\, anomalous behavior of the imaginary potential for a number of reactions were determined.\nIt was shown that\, within the framework of u sed model\, a satisfactory description can be achieved for all investigate d reactions.\n\n1. C. L. Jiang\, B. B. Back\, K. E. Rehm et al\, Eur. Phys . J. A 57\, 235 (2021).\n2. S. Y. Torilov\, N. A. Maltsev and V. I. Zhereb chevsky\, Bull. Russ. Acad. Sci. Phys. 85\, 548 (2021).\n3. S. Y. Torilov\ , N. A. Maltsev and V. I. Zherebchevsky et al\, Phys. Part. Nuclei 53\, 40 3 (2022)\n4. R. Ogura\, K. Hagino and C. A. Bertulani\, Phys. Phys. Rev. C 99\, 065808 (2019).\n\nhttps://events.sinp.msu.ru/event/8/contributions/3 02/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/302/ END:VEVENT BEGIN:VEVENT SUMMARY:STRUCTURE AND SYNTHESIS OF MAGNETIZED HEAVY NUCLEI DTSTART;VALUE=DATE-TIME:20220713T070000Z DTEND;VALUE=DATE-TIME:20220713T072000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-318@events.sinp.msu.ru DESCRIPTION:Speakers: Alina Ulanova (Russia)\, Vladimir Kondratyev (JINR )\nNucleosynthesis at large magnetic induction relevant for core-collapse supernovae\, and neutron star mergers is considered. For respective magnet ic fields of a strength up to ten teratesla atomic nuclei exhibit linear m agnetic response due to the Zeeman effect. Such nuclear reactivity can be described in terms of magnetic susceptibility [1]. Susceptibility maxima c orrespond to half-filled shells. The neutron component rises linearly with increasing shell angular momentum\, while the contribution of protons gro ws quadratically due to considerable income from orbital magnetization. Fo r a case j = l + 1/2 the proton contribution makes tens of nuclear magneto ns and exceeds significantly the neutron values which give several units. In a case j = l – 1/2 the proton component is almost zero up to g-shell. Respectively\, a noticeable increase in the generation of corresponding e xplosive nucleosynthetic products with antimagic numbers is predicted for nuclei at charge freezing conditions. In the iron group region new seeds a re created also for the r-process. In particular\, the magnetic enhancemen t of the volume of 44Ti isotopes is consistent with results from observati ons and indicates the substantial increase in the abundance of the main ti tanium isotope (48Ti) in the Galaxy’s chemical composition. Magnetic eff ects are proved to result in a shift of the r-process path towards smaller mass numbers\, and an increase in the volume of low mass nuclides in peak s of the r-process nuclei.\n\nhttps://events.sinp.msu.ru/event/8/contribut ions/318/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/318/ END:VEVENT BEGIN:VEVENT SUMMARY:Precision measurement of 144Ce – 144Pr beta-spectrum DTSTART;VALUE=DATE-TIME:20220713T074000Z DTEND;VALUE=DATE-TIME:20220713T080000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-320@events.sinp.msu.ru DESCRIPTION:Speakers: Ilia Drachnev (PNPI NRC KI)\nBeta-decay is a specifi c decay process that undergoes a reaction with thee-particle product compo sition that results in continuous spectral shape of electrons or positrons . The shape of the spectrum was described already in 1934 by E. Fermi [1]\ , but such description appeared to be valid only for allowed transitions ( ΔI = 0\,1 Δπ = 1). Involvement of nuclear exchange in other types of tr ansitions complicates such decay description and often makes it necessary to perform experimental evaluation. \nPrecision beta-spectra measurement a lways had a great importance in some fundamental physics problems includin g neutrino physics\, e.g. a 144Ce – 144Pr source is one of the most suit able to search for neutrino oscillation into sterile state for sterile neu trino mass around 1 eV. Magnetic and electrostatic spectrometers have high resolution\, but at the same time usage of such kinds of equipment involv es the size and cost issues. Since electron mean free path at the energy o f 3 MeV (which is basically the maximum energy of a beta-transition for th e long-lived nuclei) does not exceed 2 g/cm2\, electron registration could be effectively performed with the solid state scintillators and semicondu ctors. \nA strong probability of backscattering from detector surface is p resent in case of semiconductor detectors and is dependent upon the detect or material. One possible way of solving this issue is a precise simulatio n of the spectrometer response function that is quite promising as it coul d be used in a very simple target-detector setup. Another solution to this problem is usage of 4π geometry [2]\, that fully covers the radioactive source and is able to register the backscattered electrons. \nIn this work we present the results of 144Ce – 144Pr spectrum measurement performed with two setups of both types and controlled with the shape of an allowed 0- – 1- transition in 144Pr\, having precision that was substantially increased with respect to the previous studies of these beta-spectra. We h ave obtained parameter values for the paramertrized transition shape facto r that is compared with the other experiments and could be used for electr on antineutrino spectrum definition.\n\nhttps://events.sinp.msu.ru/event/8 /contributions/320/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/320/ END:VEVENT BEGIN:VEVENT SUMMARY:Confinement potential from holographic approach to strong interact ions DTSTART;VALUE=DATE-TIME:20220713T074000Z DTEND;VALUE=DATE-TIME:20220713T080000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-618@events.sinp.msu.ru DESCRIPTION:Speakers: Sergey Afonin (Saint-Petersburg State University)\nW e derive and analyze the confinement potential of the Cornell type between two static color sources within the framework of a generalized Soft Wall holographic approach to strong interactions. This approach was originally developed for describing the linear Regge spectrum of light mesons. The '' linear plus Coulomb'' confinement potential is obtained both in the vector and in scalar channels. It is shown that the quantitative agreement with the phenomenology and lattice simulations is better in the scalar channel. \n\nhttps://events.sinp.msu.ru/event/8/contributions/618/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/618/ END:VEVENT BEGIN:VEVENT SUMMARY:DEPENDENCE OF THE CONVERSION WIDTHS ON THE FINE STRUCTURE OF THE E LECTRON SHELL DTSTART;VALUE=DATE-TIME:20220713T081000Z DTEND;VALUE=DATE-TIME:20220713T083000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-614@events.sinp.msu.ru DESCRIPTION:Speakers: Feodor Karpeshin ()\n**Usually internal conversion ( IC)\, and IC coefficients (ICC) in particular\, are considered under the a ssumption of a closed shell of the initial atom. Its angular momentum is t hen zero. As a rule\, this approximation is sufficient for the purposes of experiment in neutral atoms or ions of low multiplicity. However\, modern experiments on storage rings\, for example\, in GSI or Lanzhou\, are carr ied out with few-electron ions\, for example\, with helium (He)- or lithiu m (Li)-like ones. In this case\, the electron shell has an angular momentu m other than zero\, which will certainly affect the probability and coeffi cient of the IC. To illustrate\, consider as an example a E2 transition of a nucleus from the initial excited state with spin I1 = 2 to the final st ate with spin I2 = 0 in a beryllium-like ion 1s22s2p1/2. Then the total mo mentum of the electron shell J1 can take on the values J1 = 0 or 1\, and t he conversion probability on the 2p electron will be proportional to 2J1+1 . A similar conclusion can be drawn in the case of the Li-like initial con figuration 1s22p1/2. As a result\, the conversion probabilities and\, acco rdingly\, the ICC in these states will be related as 1 : 3 : 2\, respectiv ely. The issue of total angular momentum is of fundamental importance in t he case of a reverse IC (NEECxe [1]). The report develops the theory of th e question as applied to the conventional and inverse IC.\n\n1. F. F. Karp eshin\, M. B. Trzhaskovskaya\, C. Brandau. Reverse Conversion in $^{161}$D y Ions as an Extension of Dielectronic Recombination. Izv. RAN\, Ser. Fiz .\, 78\, 891 (2014) [Bull. Russian Acad. Sci.\, Physics\, {\\bf 78}\, 67 2 (2014)].\n**\n\nhttps://events.sinp.msu.ru/event/8/contributions/614/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/614/ END:VEVENT BEGIN:VEVENT SUMMARY:STUDYING THE DOSE LOAD ON THE RESPIRATORY SYSTEM FROM HEAVY NATURA L RADIONUCLIDES DURING TOBACCO SMOKING DTSTART;VALUE=DATE-TIME:20220713T074000Z DTEND;VALUE=DATE-TIME:20220713T080000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-332@events.sinp.msu.ru DESCRIPTION:Speakers: Mirgul Bigeldiyeva (al-Farabi Kazakh National Univer sity)\nAccording to the ICRP (publications No. 50 and No. 65)\, radon and its decay products (Rn-DP) contribute more than 50% to the total radiation background. In Kazakhstan\, cancer incidence rates remain among the highe st among the CIS countries [1-2] and 28831 new cases were detected in 2020 [3]. Currently\, it has been proven that the main cause of lung cancer is smoking [4]. However\, despite the fact that the first place as a cause o f lung cancer is occupied by tobacco smoking\, the second place is occupie d by the inhalation of radon and Rn-DP. Toxic chemicals in tobacco smoke a re one reason why cigarettes cause cancer\, but radioactive heavy elements also play a significant role in them. They accumulate in tobacco leaves a t the time of their vegetation due to absorption from the soil and air\, a nd the rate of absorption depends on the pH of the soil. The decay product of radon\, Pb-210\, plays an important role in human radiation exposure\, since it has a long residence time in the body [5]. This contributes to a n increase in the dose of internal radiation and increases risk of lung ca ncer. For this reason\, conducting studies on the quantitative assessment of the concentration of natural beta-radionuclides in the lungs due to smo king as one of the causes of the carcinogenic effect is an urgent task. \n In this work\, the authors performed a quantitative assessment of the conc entration of natural beta-radionuclides in six samples of the most popular tobacco products in the Kazakhstan. The beta activity concentrations of t he samples were measured by beta spectrometry using a scintillation detect or. The results of the preliminary analysis of this work show that the low er threshold for the activity of beta-radionuclides in the tobacco of one cigarette is 60 mBq. A person who smokes one pack a day (20 cigarettes) in hales an average of 120 mBq. The annual effective doses were calculated ba sed on the intake of Pb-210\, as having the greatest danger among other be ta radionuclides\, and amounted to 39 µSv/year for a person who smokes on e pack per day.\nThis research is funded by the Science Committee of the M inistry of Education and Science of the Republic of Kazakhstan (Grant No. AP09058404).\n\n1. A. Jemal\, R. Siegel\, and K. Miller\, C.A. Cancer. J. Clin. 66(1)\, 7 (2016).\n2. Indicators of the oncological service of the R epublic of Kazakhstan for 2019 https://onco.kz/o-rake/ponimanie-raka/stati stika-raka/\n3. J. Ferlay\, M. Ervik\, F. Lam\, M. Colombet\, Global Cance r Observatory. Lyon\, France: International Agency for Research on Cancer. Available from: https://gco.iarc.fr/today \n4. K. Nurgaziev\, G. Seitkazi na\, D. Baypeisov\, G. Seisenbaev\, and A. Zhylkaidarova\, Indicators of o ncology service in the Kazakhstan for 2017. Almaty: KazIOR\, 2017. 138 p.\ n5. B. Swift\, Forensic Sci. Int. 98\, 119 (1998).\n\nhttps://events.sinp. msu.ru/event/8/contributions/332/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/332/ END:VEVENT BEGIN:VEVENT SUMMARY:INCOHERENT NEUTRAL PION PHOTOPRODUCTION ON THE TENSOR-POLARIZED DE UTERON AT VEPP-3 DTSTART;VALUE=DATE-TIME:20220713T072000Z DTEND;VALUE=DATE-TIME:20220713T074000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-339@events.sinp.msu.ru DESCRIPTION:Speakers: Vyacheslav Gauzshtein ()\nThe results of measurement of the T20 component tensor analyzing powers in incoherent π0-meson phot oproduction on the deuteron in the proton energy range of 50–150 MeV are presented. Experimental statistics of the reaction under study was isolat ed from the experiment that was designed to investigate coherent neutral p ion photoproduction on deuteron [1-3]. In this experiment\, protons and t wo photons were recorded by the upper and lower arms of the detecting syst em\, respectively. The measured asymmetries of the yields with regard to t he change in the sign of tensor polarization of deuterons were used to cal culate the T20 component of the tensor analyzing power of the reaction und er investigation. A detailed description of the experimental setup and det ection equipment is provided in [1- 3]. \nThe obtained experimental data a re compared with the results of statistical simulation. The event generati on was followed by verification that it belongs to the permissible region of the kinematic phase space. After the generation of independent kinemati c variables\, the reaction amplitude was calculated. The model described i n [4] was used to calculate the amplitude of the neutral pion photoproduct ion. In the framework of the model\, the quasi-free pion photoproduction o n nucleons that form the deuteron and the contribution of nucleon-nucleon and pion-nucleon rescattering were considered. The measurements cover the photon energy range of (300-600) MeV. In general\, there is a qualitative agreement between experimental and available theoretical predictions. It i s planned to give further attention to extraction of the experimental data on the reaction from the experimental statistics accumulated at VEPP-3 in 2021 using the photon tagging system.\n\n\n1. Rachek I.A. er al. // Few-B ody Syst. 2017. V. 58. P. 28\n2. Gauzshtein V.V. et al. // European Physic al Journal A. 2020. V.56. P.169.\n3. Gauzshtein V.V. et al. // Modern Phys ics Letters A. 2021. V. 36. P. 2150199\n4. Fix A.\, Arenhövel H. // Phys. Rev. C. 2005. V. 72. P. 064005.\n\nhttps://events.sinp.msu.ru/event/8/con tributions/339/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/339/ END:VEVENT BEGIN:VEVENT SUMMARY:FLUCTUATIONS OF THE INDUCED CHARGE CAUSED BY FLUCTUATIONS OF THE X -RAY QUANTUM ABSORPTION POINT IN A PLANE-PARALLEL SEMICONDUCTOR DETECTOR DTSTART;VALUE=DATE-TIME:20220713T081000Z DTEND;VALUE=DATE-TIME:20220713T083000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-350@events.sinp.msu.ru DESCRIPTION:Speakers: Victor Samedov ()\nThe book [1] provides a formula f or fluctuations of the induced charge caused by the trapping of electrons and holes in the volume of a plane-parallel semiconductor detector\, obtai ned in [2]. However\, this formula was obtained for the case of a homogene ous distribution of X-ray quantum absorption points in the volume of the d etector\, and does not take into account the attenuation of the X-ray quan tum flux as it penetrates into the detector. In [3]\, an attempt was made to take into account the attenuation of the X-ray quantum flux\, but the f ormula published by the authors contains errors.\nIn this paper\, formulae are obtained for the fluctuations of the induced charge on the detector e lectrodes caused by fluctuations in the absorption point of the X-ray quan tum\, taking into account the law of attenuation of the X-ray quantum flux . The obtained formulae demonstrate the role of covariance of induced char ge on the detector electrodes caused by random processes occurring in the detector at the registration of X-rays.\n\n1. A. Owens Compound Semiconduc tor Radiation Detectors\, CRC Press (2012).\n2. J. S. Iwanczyk\, .W. F. Sc hnepple\, M .J. Masterson\, Nucl. Instr. Meth. in Phys. Res. A. 322\, 421 (1992).\n3 A. Ruzin\, Y. Nemirovsky\, J. Appl. Phys. 82\, 2754 (1997).\n\n https://events.sinp.msu.ru/event/8/contributions/350/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/350/ END:VEVENT BEGIN:VEVENT SUMMARY:A LINEAR ELECTRON ACCELERATOR WITH AN ENERGY OF 8-50 MEV WITH INJE CTION FROM AN ELECTRON SOURCE BASED ON CLUSTER PLASMA SYSTEMS DTSTART;VALUE=DATE-TIME:20220713T074000Z DTEND;VALUE=DATE-TIME:20220713T080000Z DTSTAMP;VALUE=DATE-TIME:20260519T123854Z UID:indico-contribution-42-352@events.sinp.msu.ru DESCRIPTION:Speakers: Ilia Ashanin (NRNU MEPHI)\nThe problem of increasing of the acceleration rate in linear electron accelerators has been one of the key problems for modern accelerator physics for many years. The physic al limit of the accelerating field strength for normal (50 - 100 MV/m) and superconducting accelerating structures (over 200 MV/m) has been practica lly reached\, and therefore various new acceleration schemes are being con sidered\, primarily plasma acceleration and wakefield acceleration [1].\nI t seems interesting to consider a system in which one can try to bypass th e limitations inherent in photoguns (the dominant effect of the space char ge in the near-cathode region during injection) and acceleration in the la ser-plasma channel (low electron transmission coefficient in the accelerat ion mode\, wide energy spectrum (up to 10%) and low repetition rate pulses \, limited by the capabilities of laser systems) [2]. Many works have appe ared devoted to the preliminary modulation of the beam in the plasma chann el\, which makes it possible to improve the spectrum of accelerated electr ons by a factor of approximately 3–4 [3].\nIt is proposed to consider th e possibility of using a bunch generated in a laser-plasma channel for inj ection into a traditional structure based on RF cavities. It is supposed t o show that a plasma source of electrons based on cluster plasma can produ ce a short (from 0.1 to 1.0 ps) bunch of electrons with an energy of sever al hundred keV [4]\, which makes it possible to consider such a source as an alternative to the photocathode. Next\, the beam must be captured into the acceleration mode in a normally conducting section operating on a stan ding wave and accelerated to an energy of 50 MeV with adjustable energy.\n The features of such a source are considered\, including the possible ener gy spectrum\, and features of an electron bunch capturing with the achieve d parameters in the acceleration mode will discuss in the report. All resu lts of the beam dynamics simulation carried out using the BEAMDULAC packag e developed at the Department of Electrophysical Facilities of NRNU MEPhI [5].\n\n1. Ya. Fineberg\, Atomic Energy 6\, p. 341 (1959)\n2. V. Leurent\, C. Clayton et al.\, Proc. of EPAC’08 (2008)\, pp. 2809–2811.\n3. S. P olozov\, V. Rashchikov\, Cybernetics and Physics\, 7 4 (2018)\, pp. 228– 232.\n4. A. Shkurinov et al.\, Journ. of the Optic. Soc. of America B\, 38 11 paper 3515 (2021)\n5. E. Masunov\, S. Polozov\, Nucl. Instrum. Meth. A 558\, (2006)\n\nhttps://events.sinp.msu.ru/event/8/contributions/352/ LOCATION: URL:https://events.sinp.msu.ru/event/8/contributions/352/ END:VEVENT BEGIN:VEVENT SUMMARY:SOME REGULARITIES IN THE FORWARD ANGLE YIELDS OF ISOTOPES WITH 4