Chinese Physics C > 2013, Vol. 37 > Issue(4): 046202 DOI: 10.1088/1674-1137/37/4/046202

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

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Abstract：
An experimental system aimed at n- γdiscrimination 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- γdiscrimination 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- γdiscrimination in terms of FOM was compared with previous work done by other groups. The n- γdiscrimination 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- γdiscrimination threshold can go down to 0.4 MeV.

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CHEN Yong-Hao, LEI Jia-Rong, ZHANG Xiao-Dong, AN Li, ZHENG Pu, WANG Xin-Hua, ZHU Chuan-Xin and HE Tie. Study of n- γdiscrimination for 0.4-1 MeV neutrons using the zero-crossing method with a BC501A liquid scintillation detector[J]. Chinese Physics C, 2013, 37(4): 046202. doi: 10.1088/1674-1137/37/4/046202

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Received: 2012-05-23
Revised: 1900-01-01

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author:AN Li,

Received Date:2012-05-23
Accepted Date:1900-01-01
Available Online:2013-04-05

Abstract:An experimental system aimed at n-γdiscrimination using the zero-crossing method with aφ3"× 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-γdiscrimination 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-γdiscrimination in terms of FOM was compared with previous work done by other groups. The n-γdiscrimination 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-γdiscrimination threshold can go down to 0.4 MeV.