几套就地HPGe γ谱仪系统的死时间修正  

Deadtime Correction of Several in-situ HPGe γ Spectrometers

作　　者：陈伟[1] 冯天成[1] 晏林[1] 苏川英[1] 吴睿[1] 龙斌[1] 冯元举[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《原子能科学技术》2010年第5期589-594,共6页Atomic Energy Science and Technology

摘　　要：用强源干扰法实验研究了几套就地HPGeγ谱仪系统的死时间修正问题,得到了在不同百分死时间下的修正因子,拟合获得了修正函数,并与谱仪系统的自动修正结果进行了比较分析。结果显示:在实验所控制的死时间范围内,死时间与修正因子间呈线性关系;谱仪系统自动修正结果与实验修正值间的最大相对偏差小于4.4%。这说明,在1.13%～52.95%死时间范围内,这几套谱仪系统的死时间自动修正结果是准确的,也表明现代γ谱仪系统死时间修正技术是有效的,可应用于数据分析中。Deadtime corrections of three in-situ HPGe γ spectrometers were studied by experimental method of interference-method with strong γ source.The linear relationships between the percent deadtime and the correction coefficients were fitted by the least-square-method.The comparisons between the experimental results and the automatic correction values of full-energy-peak count rates were performed.The results show that the maximum deviation of the automatic correction values relatively to the experimental results is less than 4.4%.It indicates that in the deadtime range of 1.13%-52.95%,the automatic correction results of deadtime by these spectrometers themselves are exact and the deadtime correction techniques of modern γ spectrometers are efficacious,which can be used in the data analysis of γ spectra.

关 键 词：就地HPGeγ谱仪系统 死时间修正 强源干扰法 自动修正 

分 类 号：TL81[核科学技术—核技术及应用]