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为提高放射性计量水平 ,加强国际合作 ,用日本电子技术综合研究所 (ETL)送国际计量局(BIPM)的国际参考系统 (SIR)比对测量的同一批59Fe放射性标准溶液 ,刻度了 4πγ高气压电离室 ,并用 4πβ γ符合方法进行了绝对测量 ,测量结果与各家实验室的结果进行了比对 ,与日本ETL的结果和SIR平均值分别在 - 0 2 7%和 - 0 15 %内一致
In order to enhance the level of radioactivity measurement and strengthen international cooperation, the same batch of 59Fe radioactive standard solutions measured by International Electrotechnical Commission (ETL) International Bureau of Metrology (BIPM) International Reference System (SIR) was compared to 4πγ high pressure Ionization chamber and the absolute measurement was carried out by the 4πβγ coincidence method. The measurement results were compared with the results of various laboratories and were consistent with the results of the Japanese ETL and the mean SIR within -0.27% and -0.15%, respectively