摘要
为实现饮用水总β放射性活度的在线测量,采用Geant4软件对闪烁光纤阵列探测器结构进行了优化设计,并对探测器基本性能进行了模拟和实验。闪烁光纤阵列探测器β粒子探测效率的蒙卡模拟结果为1.31 s-1/(Bq/L),探测器在17 h内总β最小可探测活度为0.1 Bq/L,10 min内总β最小可探测活度为1.0 Bq/L,在水样无浓集的前提可实现水中总β放射性活度在线监测和超阈值报警。
To achieve on-line measurement of gross beta radioactivity in drinking water,the structure of the scintillating fiber array detector is optimized using Geant4 software,and the basic performance of the detector is simulated and experimentation.The detection efficiency of the detector for gross β is 1.31 s^-1/（Bq/L）,and the minimum detectable activity of the optimized detector is 0.1 Bq/L for 17 h and1.0 Bq/L for 10 min.The detector can achieve on-line measurement for gross beta and super threshold alarm without concentration.
作者
吕汶辉
衣宏昌
曾志
马豪
张辉
LV Wen-hui;YI Hong-chang;ZENG Zhi;MA Hao;ZHANG Hui(Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Rocket Force University of Engineering,Xi＇an 710025,China)
出处
《核电子学与探测技术》
CAS
北大核心
2018年第2期254-259,共6页
Nuclear Electronics & Detection Technology
基金
国家重点研发计划(2016YFF03902)
科技部科技基础性工作专项(2012FY130200)资助
关键词
闪烁光纤
总β
在线测量
饮用水
scintillating fiber
gross beta
on-line measurement
drinking water
