级联符合相加修正因子的传递
Transfer of cascade coincidence summing correction factors
孔令南 1杨宝路 1叶政霖 1张京 1周强1
作者信息
- 1. 中国疾病预防控制中心辐射防护与核安全医学所辐射防护与核应急中国疾病预防控制中心重点实验室,北京 100088
- 折叠
摘要
目的 通过相关测量分析,进一步拓展符合相加修正因子传递实验的应用.方法 用BE5030高纯锗γ能谱仪配备的LabSOCS模拟无源效率,在GENIE 2000 解谱软件中调用LabSOCS模拟的总效率计算符合相加修正因子,通过含有134Cs、60Co和137Cs的点源和体源配合测量的符合相加修正因子传递实验,得到其他高纯锗γ能谱仪的符合相加修正因子.结果 BE5030 γ能谱上分别得到的134Cs、60Co符合相加修正因子,经证书活度验证,最大偏差绝对值在3.53%以内;通过符合相加修正因子传递实验,将其传递到其他高纯锗γ谱仪,经证书活度验证,最大偏差绝对值在5.86%以内.结论 在GENIE 2000解谱软件中,调用LabSOCS模拟总效率计算的符合相加修正因子,修正效果良好,可作为标准实验室的修正因子使用.通过符合相加修正因子传递实验,可较好地实现其他高纯锗γ能谱仪的符合相加修正,拓宽符合相加修正方法.
Abstract
Objective To further extend the application of coincidence summing correction factor transfer experiments through the analysis of relevant measurements.Methods The passive efficiency was simulated using BE5030 high-purity germanium(HPGe)γ-energy spectrometer equipped with LabSOCS,and the total efficiency was simulated using LabSOCS in GENIE 2000 spectrum analysis software,which was used for calculating the coincidence summing correction factor.The coincidence summing correction factor transfer experiments were performed using the measurements with the point source containing 134Cs,60Co,and 137Cs as well as the body source to obtain the coincidence summing correction factors of other HP-Ge γ-energy spectrometers.Results The coincidence summing correction factors for 134Cs and 60Co were obtained using the BE5030 γ-energy spectrum.In verification by certificate activity,the absolute value of the maximum deviation was with-in 3.53%.Using coincidence summing correction factor transfer experiments,these factors were transferred to other high-purity germanium γ spectrometers.In verification by certificate activity,the absolute value of the maximum deviation was within 5.86%.Conclusion The coincidence summing correction factors calculated using simulated total efficiency by call-ing LabSOCS in the GENIE 2000 spectrum analysis software are effective in correction,and can be used as correction factors in standard laboratories.Through coincidence summing correction factor transfer experiments,the coincidence sum-ming correction of other high-purity germanium γ-energy spectrometers can be achieved,which broadens the application of coincidence summing correction method.
关键词
γ能谱/符合相加效应/修正因子/无源效率刻度Key words
γ-Energy spectrum/Coincidence summing effect/Correction factor/Sourceless efficiency calibration引用本文复制引用
出版年
2024
NETL
NSTL
万方数据