IAEA国际比对样品的γ谱分析

本实验室使用超低本底HPGe γ谱仪参加了2006年IAEA组织的γ核素放射性活度测量比对.按比对要求测量了土壤和水样中54Mn, 60Co, 65Zn, 134Cs, 137Cs, 241Am, 109Cd, 210Pb以及草样中的40K, 137Cs.使用无源效率刻度软件LabSOCS对HPGe γ谱仪进行效率刻度,γ谱分析采用Genie 2000分析软件.与IAEA的参考值相比,本实验室报出的测量值的总体接受率为89%,不被接受率为0,高于327个参加比对实验室分析结果为64%的总体可接受率,明显低于29%的总体不被接受率.

Gamma Spectrum Analysis of IAEA International Intercomparison Samples

In 2006, the international intercomparision of gamma-radionuclides was conducted by ultra-low background HPGe γ- spectrometer systems in our lab. According to IAEA’s rules, activities of ⁵⁴Mn, ⁶⁰Co, ⁶⁵Zn, ¹³⁴Cs, ¹³⁷Cs, ²⁴¹Am, ¹⁰⁹Cd, and ²¹⁰Pb in soil and water, and ⁴⁰K, ¹³⁷Cs in grass have to be measured. The activies of these radionuclides were performed by Genie 2000 for γ-spectra analysis and by LabSOCS for efficiency calibration. Our laboratory obtained excellent scores with 89% for acceptable and 0 for not acceptable. The percentage of acceptable is obviously higher than average value 64% in all the participant labs, while those of not acceptable are lower than average 29%.