室内多道γ射线能谱仪(NaI(Tl))谱线分析  

Spectrum Analysis With Indoor Multi-channels Gamma-rays Spectrometer(NaI(Tl))

作　　者：侯胜利[1] 樊卫花[2] 

机构地区：[1]中国地质大学(北京)地球物理与信息技术学院地下信息探测技术与仪器教育部重点实验室,北京100083 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《同位素》2005年第1期63-66,共4页Journal of Isotopes

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.

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 

分 类 号：TL816.2[核科学技术—核技术及应用]