Study of n-γ discrimination for 0.4-1 MeV neutrons using the zero-crossing method with a BC501A liquid scintillation detector

An experimental system aimed at n-γ discrimination using the zero-crossing method with a φ3’’×2’’ BC501A liquid scintillation detector was established and tested with an Am-Be neutron source. Two-dimensional plots of energy versus zero-crossing time were obtained. The quality of n-γ discrimination w...

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Published inChinese physics C Vol. 37; no. 4; pp. 69 - 72
Main Author 陈永浩 雷家荣 张小东 安力 郑普 王新华 朱传新 何铁
Format Journal Article
LanguageEnglish
Published 01.04.2013
Subjects
Detectors
Discrimination
Intervals
Liquids
MeV
Neutron sources
Scintillation
Thresholds
Two dimensional
中子源
交叉法
品质因数
实验系统
时间间隔
检测器
液体闪烁探测器
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ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/37/4/046202

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Summary:An experimental system aimed at n-γ discrimination using the zero-crossing method with a φ3’’×2’’ BC501A liquid scintillation detector was established and tested with an Am-Be neutron source. Two-dimensional plots of energy versus zero-crossing time were obtained. The quality of n-γ discrimination was checked by the figure-of-merit （FOM）, the neutron peak-to-valley ratio, and the proportion of leaked neutrons over all neutron events. The performance of n-γ discrimination in terms of FOM was compared with previous work done by other groups. The n-γ discrimination in four different energy regions with an interval of 0.1 MeV between 0.3 MeV and 0.7 MeV was studied, and the results indicate that the n-γ discrimination threshold can go down to 0.4 MeV.
Bibliography:11-5641/O4
n-γ discrimination； BC501A liquid scintillator； neutron energy spectrum
An experimental system aimed at n-γ discrimination using the zero-crossing method with a φ3’’×2’’ BC501A liquid scintillation detector was established and tested with an Am-Be neutron source. Two-dimensional plots of energy versus zero-crossing time were obtained. The quality of n-γ discrimination was checked by the figure-of-merit （FOM）, the neutron peak-to-valley ratio, and the proportion of leaked neutrons over all neutron events. The performance of n-γ discrimination in terms of FOM was compared with previous work done by other groups. The n-γ discrimination in four different energy regions with an interval of 0.1 MeV between 0.3 MeV and 0.7 MeV was studied, and the results indicate that the n-γ discrimination threshold can go down to 0.4 MeV.
CHEN Yong-Hao ,LEI Jia-Rong , ZHANG Xiao-Dong , AN Li ,ZHENG Pu ,WANG Xin-Hua , ZHU Chuan-Xin ,HE Tie （ 1 Institute of Nuclear Physics and Chemistry, Chinese Academy of Engineering Physics, Mianyang 621900, China ;2 School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China）
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ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/37/4/046202