High efficiency method of fast neutron detection by oxide scintillators for detection systems of fissionable radioactive substances

Conference · Fri Jul 01 00:00:00 EDT 2011

DOI:https://doi.org/10.1109/ANIMMA.2011.6172929· OSTI ID:22039891

Ryzhikov, V D; Grinyov, B V; Onyshchenko, G M; Piven, L A; Lysetska, O K; Nagornaya, L L ^[1]

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1. Inst. for Scintillation Materials, National Academy of Sciences of Ukraine, 61001 Kharkov (Ukraine)

Comparative measurements and analysis of detection efficiency (DE) of fast neutrons from {sup 239}Pu-Be source have been carried out in a broad energy range En {approx} 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 ({approx} 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. (authors)

• OSTI ID: 22039891
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BISMUTH GERMANATES
CADMIUM TUNGSTATES
FAST NEUTRONS
FISSIONABLE MATERIALS
GADOLINIUM COMPOUNDS
INELASTIC SCATTERING
LITHIUM IODIDES
NEUTRON DETECTION
NEUTRON DETECTORS
PHOSPHORS
PLUTONIUM 239
SCINTILLATION COUNTERS
SILICATES
ZINC SELENIDES
ZINC TUNGSTATES