CLYC中子-γ复合测量仪设计

Design of n-γComposite Measurement with CLYC Detector

为实现CLYC晶体探测器用于中子-γ复合测量,研究了中子-γ脉冲甄别方法,模拟计算了CLYC晶体对中子与γ射线的能谱响应和探测效率,优化设计了快中子慢化体厚度,为CLYC中子-γ复合测量仪研制提供参考。对CLYC中子-γ复合测量仪样机测试表明:对于137Cs源γ能量分辨率为5.2%,252Cf中子源对应的峰位能量为3.2MeV,可用于中子-γ复合测量。

In order to design the CLYC detector for n-γcomposite measurement,the energy spectrum and detection efficiency of the CLYC crystal to neutron andγrays were simulated using MCNP program,and the neutron moderation structure was optimized to improve neutron detection efficiency.The n-γpulse discrimination method was studied,which shows the pulse shape discrimination method could be ideal for n-γdiscrimination.Experiments on the prototype of CLYC detector show that theγenergy resolution of 137Cs source is 5.2%,and the peak energy corresponding to the 252Cf neutron source is 3.2 MeV,which means the CLYC detector can be used for neutron-γcomposite measurement.