Title :
High efficiency method of fast neutron detection by oxide scintillators for detection systems of fissionable radioactive substances
Author :
Ryzhikov, Volodymyr D. ; Grinyov, Borys V. ; Onyshchenko, Gennadiy M. ; Piven, Leonid A. ; Lysetska, Olena K. ; Nagornaya, Ludmila L.
Author_Institution :
Inst. for Scintillation Mater., Kharkov, Ukraine
Abstract :
Comparative measurements and analysis of detection efficiency (DE) of fast neutrons from 239Pu-Be source have been carried out in a broad energy range En ~ 0.1 ÷ 10 MeV using oxide scintillators BGO, GSO, CWO, ZnWO, ZnSe(Te, O), as well as LiI(Eu). DE of fast neutrons by heavy oxide scintillators was found to be very high (~ 40-50 %). The neutron inelastic scattering reaction (n, n´y) is considered as the most probable interaction mechanism of neutrons with nuclei of heavy oxide scintillators. It is concluded that heavy oxide scintillators, which are at the same time efficient gamma-detectors, allow creation of a highly efficient gamma-neutron detector ensuring high detection efficiency of fissionable radioactive substances.
Keywords :
neutron detection; scintillation counters; semiconductor counters; 239Pu-Be source; fast neutron detection efficiency; fissionable radioactive substances; heavy oxide scintillators; high efficiency method; neutron inelastic scattering reaction; time efficient gamma-detectors; Atomic measurements; Detectors; Lead; Materials; Neutrons; Scattering; Velocity measurement;
Conference_Titel :
Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2011 2nd International Conference on
Conference_Location :
Ghent
Print_ISBN :
978-1-4577-0925-8
DOI :
10.1109/ANIMMA.2011.6172929
