摘要
论述了以NaI(Tl)晶体为探测器的室内低本底多道γ射线能谱仪用于测量样品中226Ra、232Th和40K放射性比活度的两种计算方法———谱线分解法和特征能量峰法(逆矩阵法),并设计编制程序,分别采用这两种方法对样品谱线进行处理分析,将分析结果与高纯锗γ谱仪分析结果对比,两种方法分析同一样品的相对偏差均≤10%。
Two calculational methods for analyzing the spectrum which measured by indoor low background multi-channels gamma-rays spectometer(Na(Tl)) to get the specific activity of 226Ra, 232Th and 40K of the sample are discussed, they are the spectrum analysis method and the characteristic energy peak method(inverse matrix method) respectively. The sample spectrum are analyzed with the program designed according to the two methods, and compared with the results by HPGe gamma-rays spectrometer, showing that the relative deviation is ≤10% with the two methods.
出处
《同位素》
CAS
北大核心
2005年第1期63-66,共4页
Journal of Isotopes
关键词
室内多道γ能谱仪
放射性比活度
谱线分解法
逆矩阵法
indoor multi-channels gamma-rays spectometer
specific activity
spectrum analysis method
inverse matrix method
作者简介
侯胜利(1966～),男(汉族),河北行唐县人,博士,主要从事放射性测量仪器的研制开发以及放射性测量方法技术研究与教学工作
