基于6LiF/ZnS(Ag)和闪烁光纤的宽能谱中子探测技术研究  

Research on Wide Energy Spectrum Neutron Detection Technology Based on 6LiF/ZnS(Ag)and Scintillating Fiber

作　　者：熊帮平 吴志强[1] 万波 杨戴博[1] 李昆[1] 黎刚 张虎 Xiong Bangping;Wu Zhiqiang;Wan Bo;Yang Daibo;Li Kun;Li Gang;Zhang Hu(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213

出　　处：《核动力工程》2022年第4期213-217,共5页Nuclear Power Engineering

摘　　要：为了解决传统中子探测器在狭窄空间、强电磁干扰、远距离传输等复杂环境下探测中子时存在的不足,本研究将^(6)LiF/ZnS(Ag)混合材料和闪烁光纤相结合,设计了一种可用于宽能谱中子测量的新型闪烁体光纤中子探测器。基于蒙特卡罗粒子输运计算程序FLUKA对该新型光纤中子探测器的中子探测性能进行了模拟研究,完成了闪烁体光纤探头的优化设计。结果表明,当入射中子的能量在0.01~10 eV和0.5~10 MeV范围时,该新型中子探测器具有较高的中子探测效率,可用于热中子-快中子宽能谱范围中子的探测;通过对比脉冲幅度的差异,该新型中子探测器能够实现n-γ信号的甄别。To solve the shortcomings of traditional neutron detectors in neutron detection in complex environments such as narrow space,strong electromagnetic interference,and long-distance transmission,this study combines 6LiF/ZnS(Ag)mixed materials and scintillating fiber to design a new type of scintillator fiber neutron detector that can be used for wide energy spectrum neutron measurement.Based on the FLUKA software,the neutron detection performance of the new fiber neutron detector was simulated and the optimization design of the scintillator fiber probe was completed.The results show that when the energy of the incident neutron is 0.01~10eV and 0.5~10MeV,the new neutron detector has a high neutron detection efficiency,it can detect the neutron in the wide spectrum of thermal neutron and fast neutron.In addition,by comparing the difference in pulse amplitude,the new neutron detector can realize the discrimination of n-γsignals.

关 键 词：6LiF/ZnS(Ag) 闪烁光纤 探测效率 n-γ甄别 FLUKA 

分 类 号：TL363[核科学技术—核技术及应用]