A new key comparison of the standards for air kerma of the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA), Australia and the Bureau International des Poids et Mesures (BIPM) was carried out in the ⁶⁰Co radiation beam of the BIPM in November 2020. The comparison result, based on the calibration coefficients for two transfer chambers and expressed as a ratio of the ARPANSA and the BIPM standards for air kerma, is 0.9986 with a combined standard uncertainty of 2.7 parts in 10³. The result agrees within the uncertainties with the indirect comparison carried out in 2010. The results are analysed and presented in terms of degrees of equivalence, suitable for entry in the BIPM key comparison database.

To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.

The final report has been peer-reviewed and approved for publication by the CCRI, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

2020 年 11 月，在 BIPM的⁶⁰ Co 辐射束中，对澳大利亚辐射防护和核安全局 (ARPANSA) 和国际测量与测量局 (BIPM) 的空气比释动能标准进行了新的重点比较. 比较结果基于两个传输室的校准系数，并表示为 ARPANSA 和 BIPM 空气比释动能标准的比率，为 0.9986，组合标准不确定度为 10 ^{3 中}的 2.7 份。结果与 2010 年进行的间接比较在不确定性范围内一致。结果以等价度的形式进行分析和呈现，适合输入 BIPM 关键比较数据库。

要访问本文的正文，请单击最终报告。请注意，此文本出现在 BIPM 密钥比较数据库 https://www.bipm.org/kcdb/ 的附录 B 中。

根据 CIPM 互认安排 (CIPM MRA) 的规定，最终报告已通过同行评审并由 CCRI 批准发布。