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SUMMARY:True-coincidence-summing corrections of natural and artificial rad
 ionuclides for very low background gamma-ray spectrometry systems with act
 ive shielding using Monte Carlo simulations.
DTSTART;VALUE=DATE-TIME:20251119T141500Z
DTEND;VALUE=DATE-TIME:20251119T143000Z
DTSTAMP;VALUE=DATE-TIME:20260424T154105Z
UID:indico-contribution-29073@indico.ific.uv.es
DESCRIPTION:Speakers: Daniel Romero Fuentes (Universidad de Salamanca)\nTh
 e development of very low background γ-ray spectrometers has led to multi
 detector systems\, such as Mazinger. Mazinger is an array of two HPGe dete
 ctors and two NaI(Tl) anti-Compton rings in anticoincidence configuration.
  The detector shielding combines passive shielding\, composed of three lay
 ers of iron\, lead and copper and active shielding\, consisting of two ant
 i-muon veto detectors in addition to the previously mentioned anti-Compton
  rings. High efficiency and background reduction are achieved for low-leve
 l activity measurements\, approaching the limit of the technique. However\
 , true-coincidence-summing (TCS) effects become a drawback in Mazinger due
  to its specific anticoincidence configuration. This occurs because any si
 multaneous triggering of\nmore than one of the four detectors within the c
 oincidence window results in the event being rejected. Following the imple
 mentation of Mazinger in the Monte Carlo simulations with Geant4\, TCS cor
 rection factors were calculated\, reaching values as high as 1200 % in som
 e cases. This work presents the successful results obtained for both natur
 al and artificial multi-γ-emitting radionuclides\, including 228Ac\, 133B
 a\, 214Bi\, 139Ce\, 134Cs\, 60Co\, 152Eu\, and 209Tl.\n\nhttps://indico.if
 ic.uv.es/event/8035/contributions/29073/
LOCATION:
URL:https://indico.ific.uv.es/event/8035/contributions/29073/
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