强辐射本底对电流型PMT闪烁探测器的影响  

The Influence of Current PMT Scintillation Detector in Strong Radiation Background

作　　者：唐章奎[1] 杨高照[1] 郭洪生[1] 李波均[1] 陈钰钰[1] 黄燕[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《核电子学与探测技术》2015年第5期483-485,共3页Nuclear Electronics & Detection Technology

摘　　要：本文介绍在强辐射本底脉冲中子测量中,电流型PMT闪烁探测器测量的中子产额数据发生很大差异,究其原因是由于探测器灵敏度随本底发生了变化。在实验室,模拟测量了PMT的光电本底电流与增益的变化关系实验。运用核电子学线路分析了灵敏度发生很大的变化原因,对强核辐射本底下探测器灵敏度变化作了合理的解释,对脉冲中子产额测量数据作了合理的修正。This paper introduces that measured data of neutrons yields have big difference by PMT detector because of detector sensitivity changed with its background varying. In lab, we designed a simulation experiment, and measured PMT＇s gain change with its background current ;meanwhile,we analyze the cause of its sensitivity change by nuclear electronics, and explained PMT detector sensitivity changing reasonably in the strong nuclear radiation ambient, and correct the measurement results in the pulse neutrons yields data.

关 键 词：PMT闪烁探测器 强辐射本底 灵敏度变化 

分 类 号：O571.5[理学—粒子物理与原子核物理]