Multi-layer plastic-scintillation detector for intermediate- and high-energy neutrons with n-γ discrimination capability
Multi-layer plastic-scintillation detector for intermediate- and high-energy neutrons with n-γ discrimination capability
复制标题
具有 n-γ 辨别能力的中能和高能中子多层塑料闪烁探测器
DOI：
10.1016/j.nima.2017.05.044
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
H. Sakaguchi et al.
中科院分区：
文献类型：
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作者：
L Yu;S. Terashima;H.J.Ong;I. Tanihata;H. Sakaguchi et al.
构建并测试了一种新型中子探测器，即多层塑料闪烁体构成的具有高计数率下抑制低能γ射线的堆叠结构固体有机闪烁体。为了实现n-γ辨别，我们利用闪烁体材料中中子和γ射线相互作用产生的二次带电粒子范围的差异。利用Geant4工具进行蒙特卡罗模拟，确定了塑料闪烁体层的厚度。利用5 mm的层厚，我们在5 MeV ee阈值设置下实现了中子和γ射线的良好分离。我们还利用d+ d→n+ 3 He反应产生的两个能量的单能中子确定了探测效率。结果与Geant4模拟的核内级联强子模型（incl++）和低能中子相互作用的高精度模型（NeutronHP）吻合较好。
A new type of neutron detector, named Stack Structure Solid organic Scintillator (S 4), consisting of multi-layer plastic scintillators with capability to suppress low-energy γ rays under high-counting rate has been constructed and tested. To achieve n-γ discrimination, we exploit the difference in the ranges of the secondary charged particles produced by the interactions of neutrons and γ rays in the scintillator material. The thickness of a plastic scintillator layer was determined based on the results of Monte Carlo simulations using the Geant4 toolkit. With layer thicknesses of 5 mm, we have achieved a good separation between neutrons and γ rays at 5 MeV ee threshold setting. We have also determined the detection efficiencies using monoenergetic neutrons at two energies produced by the d+ d→ n+ 3 He reaction. The results agree well with the Geant4 simulations implementing the Li e ̀ ge Intranuclear Cascade hadronic model (INCL++) and the high-precision model of low-energy neutron interactions (NeutronHP).