通道式辐射监测仪的能窗法应用研究  

Application Study of Energy Windowing for Channel Radiation Monitors

作　　者：冯梅[1] 韦应靖[1] 唐智辉 张庆利[1] 崔伟[1] 以恒冠 Feng Mei;Wei Yingjing;Tang Zhihui;Zhang Qingli;Cui Wei;Yi Hengguan(China Institute for Radiation Protection,Taiyuan 030006,China)

机构地区：[1]中国辐射防护研究院,太原030006

出　　处：《核安全》2021年第2期98-105,共8页Nuclear Safety

摘　　要：为解决通道式辐射监测仪的误报警问题,本文全面开展了能窗法应用研究。本文首先搭建了基于大面积塑料体的探测器实验装置,使用特殊核材料的替代核素、工业放射性核素和天然放射性核素3类标准源开展了系统能量窗口分布及能窗数量实验,在实验的基础上,使用γ总计数算法和能窗算法分别对测量数据进行处理、比较及分析。研究结果表明,最优的能窗数量在3到5个之间;能窗位置是在稍高于康普顿边缘的地方有一个窗划分;能窗位置在康普顿边缘左右飘移(50道-100道)后探测系统对特殊核材料和工业放射性核素的报警能力不会降低;不同的能窗算法之间没有绝对优势,应将各算法结合使用达到降低误报警率且不漏报的目的。The application of energy windowing was studied in order to solve the false alarms problem of channel radiation monitors.Experiment with several representative radioactive sources of special nuclear materials,industrial sources and naturally occurring radioactive materials.Made three pragmatic choices needed for implementing energy windowing clearly:what regions of energies define the windows,how many of these windows are needed,and what algorithms,or combination of algorithms of the counts in the selected windows enables special nuclear materials and industrial sources be differentiated from naturally occurring radioactive materials.

关 键 词：通道式辐射监测仪 特殊核材料 天然放射性物质 误报警 能窗法 

分 类 号：TL84[核科学技术—核技术及应用]