The air kerma and absorbed dose to water standards for 60Co radiotherapy beams of 6 EURAMET NMIs were compared by circulating 2 transfer standards. The schedule for the measurements lasted from March 2013 to February 2015. The participants determined the calibration coefficients for the 2 transfer standards in both radiation quantities mentioned above. The comparison results are given in terms of air kerma and absorbed dose to water for both transfer standards as the ratio of the participants' calibration coefficients to the respective average values over all participants. Two participating NMIs, BEV and METAS, measured the transfer standards twice and three times, respectively. Hence, submeans were calculated and propagated as their respective repeated measurements are correlated. The results are also linked to the BIPM.RI(I)-K1 and BIPM.RI(I)-K4 key comparisons through the linking laboratories BEV, LNE-LNHB and VSL for the air kerma and BEV, LNE-LNHB and METAS for t...

中文翻译：

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Co-60放射束中空气比释动能和吸收剂量与水标准的比较

通过循环2种转移标准，比较了6个EURAMET NMI的60Co放射线束的空气比释动能和吸收剂量对水的标准。测量时间表从2013年3月持续到2015年2月。参与者确定了上述两种辐射量下两种转移标准的校准系数。比较结果以空气比释动能和两种转移标准品对水的吸收剂量的形式给出，作为参与者校准系数与所有参与者各自平均值的比值。两个参与的NMI，BEV和METAS，分别测量了两次和三次转移标准。因此，子手段的计算和传播是因为它们各自的重复测量值相关。结果也链接到BIPM.RI（I）-K1和BIPM。