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Study of Plastic Scintillators for Fast Neutron Measurements and the Potential Application to Neutron Cameras

Authors
Hu, R. J.Kim, C.Hong, B.Jo, M.Lee, K. S.Park, S.Sim, K. S.
Issue Date
Feb-2009
Publisher
KOREAN PHYSICAL SOC
Keywords
Fast neutrons; GEANT4 simulations; Californium; Time-of-flight method; Plastic scintillators; Neutron cameras
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.54, no.2, pp.586 - 591
Indexed
SCIE
SCOPUS
KCI
Journal Title
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
Volume
54
Number
2
Start Page
586
End Page
591
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/120609
DOI
10.3938/jkps.54.586
ISSN
0374-4884
Abstract
In this research, we measured pulse spectra of fast neutrons in an energy range from 1 to 7 MeV by using plastic scintillators. The fast neutrons emitted by spontaneous fission decays of a 5-mu Ci (252)Cf isotope, whose mean energy was similar to 2.1 MeV, were used for the measurements of the energy-dependent pulse spectra of the fast neutrons. The neutron energies were determined by using a time-of-flight method. The gamma rays, emitted together with fission neutrons, were eliminated by applying a proper cut in the time-of-flight spectrum. Monte-Carlo simulations based on a GEANT4 program were performed to predict the neutron sensitivities and the deposit energies in the scintillators. Furthermore, we performed a feasibility study on the potential application of the plastic scintillators to the measurement of neutron tracks for searching for special nuclear materials (SNM).
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