Proficiency testing with uncertainty evaluation for measuring activities per unit mass of 134 Cs and 137 Cs in brown rice in Japan.
Applied Radiation and Isotopes(2017)
摘要
In Japan, we conducted proficiency testing of activity measurement by using high-purity germanium detectors for 134Cs and 137Cs in brown rice grains. Among 176 reported results, 86 % (for 134Cs) and 93 % (for 137Cs) of the results satisfied |En| ≦ 1. However, 58 reports for 134Cs and 51 reports for 137Cs had some failures in their evaluations of uncertainties. The proficiency testing was effective to improve the ability of uncertainty evaluation.
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关键词
Proficiency testing,Cs-134,Cs-137,Uncertainty,En value
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