近距离n,γ混合脉冲辐射场中γ辐射探测技术  

Technique of γ Radiation Detection in Close Distance n, γCommix Pulse Radiation Field

作　　者：胡孟春[1] 叶文英[2] 唐章奎[1] 王振通[1] 周殿忠[1] 张建华[1] 李忠宝[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,成都绵阳621900 [2]中国工程物理研究院电子工程研究所,成都绵阳621900

出　　处：《原子核物理评论》2005年第1期64-66,共3页Nuclear Physics Review

基　　金：中国工程物理研究院专项课题基金资助项目 (902 305)~~

摘　　要：n, γ混合脉冲辐射场中, 在近距离、辐射强度低且中子辐射峰值比被测γ辐射峰值强度高的情况下, 传统γ辐射探测技术实施起来面临困难. 对PbWO4和CeF3等近年国内新研制的无机闪烁体进行了系列研究, 使用CeF3分别配光电倍增管和光电管, 组合出了对γ辐射灵敏度高, 对中子相对不灵敏, 同时脉冲响应也快的光电探测系统, 应用以此为基础的探测技术在近距离n, γ混合脉冲辐射场中, 可将脉冲γ辐射探测信噪比提高一个量级以上.It is difficult to detect low intensity γ radiation by using traditional γ radiation detection technique in a close distance n, γ commix pulse radiation field with very high intensity neutron radiation. (PbWO_4)) and CeF_3 which are newly developed inorganic scintillator in our country have been studied. Photoelectricity detector systemes which have high γ sensitivity and relative insensitive to neutron and fast time response were assembled by using CeF_3 and photomultiplier tube. The ratio of signal-to-noise for γ ray detection can be up to more than 10 times in close distance n, γ commix pulse radiation field by using this detector system.

关 键 词：n γ混合辐射场 γ辐射探测 无机闪烁体 灵敏度 CeF3 

分 类 号：TL751[核科学技术—辐射防护及环境保护]