CLYC探测器n/γ甄别方法比较

Comparison of n/γ Discrimination Methods with CLYC Detector

为了实现中子和γ射线的分辨探测,搭建了基于Cs2Li YCl6:Ce3+(CLYC)闪烁体探测器、数字示波器和后端上位机的数字化核脉冲采集及分析系统,在239Pu-Be中子源产生的n/γ混合场中进行实验验证。分别采用电荷比较法、脉冲梯度法、离散傅里叶变换法和向量投影法完成了CLYC探测器的n/γ数字化脉冲波形甄别。结果表明:几种方法均可较为理想地实现CLYC探测器的n/γ甄别,在实时监测复杂辐射场时可根据需求进行算法选取。

For discriminating and detecting neutron and gamma rays,a digital nuclear pulse sampling and analyzing system based on Cs2 Li YCl6: Ce3+(CLYC) scintillator detector,digital oscilloscope and computer was constructed. Experimental verifications were completed in n/γ mixing field produced by239 Pu-Be.Digital n/γ pulse shape discrimination with CLYC detector was realized respectively by charge comparison method,pulse gradient method,discrete Fourier transforming method and vector projection method. As indicated,all of these methods are ideal for n/γ discrimination with CLYC detector,which can be chosen from according to different requirements when detecting real-time complex radiation fields.