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SUMMARY:Neutron response function of CeBr3-NaI(Tl) phoswich spectrometer  
 for 1.0 ÷ 5.5 MeV neutron energy range
DTSTART;VALUE=DATE-TIME:20220713T153000Z
DTEND;VALUE=DATE-TIME:20220713T155000Z
DTSTAMP;VALUE=DATE-TIME:20260608T115834Z
UID:indico-contribution-248@events.sinp.msu.ru
DESCRIPTION:Speakers: Zhassulan Zeinulla (JINR\, Dubna\, Russia)\nThe γ-s
 pectrometer [1] which was assembled from 9 CeBr3-NaI(Tl) phoswich detector
 s [2] is a unit of the MULTI facility at the FLNR\, JINR (Dubna) for study
 ing the γ-emission in exotic decay of neutron-rich weakly bound nuclei li
 ke β-decay through giant dipole and pygmy resonances. It was reported [1]
  a high time and energy resolution\, high peak and suppression efficiency 
 of this spectrometer operated in the Compton suppression mode.  This repor
 t is devoted to neutron detection efficiency and influence of neutron back
 ground on γ-spectra\, particularly spectra obtained in the Compton suppre
 ssion mode.\nThe energy dependence of neutron detection efficiency at En =
  1.0   5.5 MeV energy range has been investigated. The measurements were c
 arried out by the method of tagged neutrons and 239Pu/9Be source. The α-d
 ecay of 239Pu is not accompanied by γ emission. Only γ quanta Eγ = 4.43
  MeV from the 9Be(α\, n)12C* reaction can accompanied the neutrons in abo
 ut 60% of reaction events. These γ quanta can be used as a trigger in the
  method of tagged neutrons and for En measuring by Time-of-Flight. \nThe m
 ain characteristics of the γ-ray spectrometer are presented: energy resol
 utions ΔE\, n-γ detection efficiency δγ(E) and δn(E) depending on the
  γ and n energy\, respectively. The special attention was focused on the 
 studying of neutron detection efficiency δn(E) of the CeBr3 component of 
 phoswich detectors for Compton suppression mode. The pulse shape analysis 
 of phoswich detector scintillation pulses was carried out by VME unit Mesy
 tec MDPP-16 QDC pulse processor [3]. The neutron detection efficiency was 
 obtained from tagged neutron spectra normalized to published [4] neutron s
 pectra from a 239Pu/9Be source. \n\n1.	Zh. Zeinulla\, Yu.G. Sobolev\, S.S.
  Stukalov\, I. Sivacek\, Yu.E. Penionzhkevich\, Gamma-ray spectrometer ass
 embled from 9 CeBr3-NaI(Tl) phoswich detectors\, Acta Physica Polonica B\,
  Vol.14\, N4\, pp.. 755-760\, (2021)\;\n2.	M. Gierlik et al.\, IEEE Transa
 ctions on Nuclear Science 53\, 1737 (2006).\n3.	A. Ruben et al.\, «A New\
 , Versatile\, High-performance Digital Pulse Processor with Application to
  Neutron/Gamma-Ray Pulse-Shape Discrimination in Scintillator Detectors»\
 , DOI:10.13140/RG.2.2.14187.18727.\n4.	 Van der Zwan\, L. 1968. Can. J. Ph
 ys.\, 46\, 1527.\n\nhttps://events.sinp.msu.ru/event/8/contributions/248/
LOCATION: Физический ф-т\, ауд. 5-19
URL:https://events.sinp.msu.ru/event/8/contributions/248/
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