液闪测量3H活度TDCR与ESCR法的比较  

Comparison of 3Hactivity determined by two liquid scintillation measurement methods

作　　者：李小双 韩刚 陆小军[1] 宋家斑 何林锋[1] Li Xiaoshuang;Han Gang;Lu Xiaojun;Song Jiaban;He Linfeng(Shanghai Insitution of Measurement and Testing Technology)

机构地区：[1]上海市计量测试技术研究院

出　　处：《上海计量测试》2020年第2期8-10,共3页Shanghai Measurement and Testing

基　　金：上海市质量技术监管局科技计划项目(2017-01)。

摘　　要：基于TDCR与ESCR两种不同的液体闪烁测量方法,使用两台液体闪烁计数器分别测量3H系列猝灭源,探测效率均随着猝灭程度的增加而降低,TDCR方法具有较高的探测效率,且测量值的偏差总体较小;采用ESCR方法测量猝灭指数较大的3H样品时,宜提前基于所用闪烁液的体积对3H的优值因子进行调试,并使用多组低测量效率的猝灭标准源来拟合猝灭曲线。Based on TDCR and ESCR liquid scintillation measurement methods,two instruments are used to measure two sets of 3H quenching sources,with the increase of the quenching severity,the measurement efficiency bothdecreases.Efficiency of the instrument using TDCR method is higher,and the relative deviation is smaller.When the ESCR method is used to measure activity for the severe quenching 3H sample,it is better to adjust early the figure of merit based on the volume of sample and fit the quenching curve by the multi-group standard severe quenching sources.

关 键 词：TDCR ESCR 液体闪烁计数器 猝灭 探测效率 

分 类 号：TH724[机械工程—仪器科学与技术]