建立60Co空气比释动能的独立测量溯源性
Establishing an independent measurement traceability for 60-Co Air Kerma
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中文总结 AI 辅助
CIEMAT基于137Cs原级标准，通过EGSnrc模拟确定次级电离室kQ，建立60Co空气比释动能独立溯源链，经比对验证其稳健性与溯源独立性。
中文摘要 AI 辅助
在西班牙国家研究委员会下属的CIEMAT电离辐射计量实验室（LMRI-CIEMAT），基于137Cs原级标准提供的参考，成功建立了适用于辐射防护水平的60Co空气比释动能独立溯源链。为实现这一目标，研究人员对一台具有合适能量响应的次级标准电离室进行了表征，并通过EGSnrc代码的蒙特卡罗模拟精确确定了其束质修正因子kQ。该方法的准确性通过与长期历史校准数据的对比得到验证，且因CIEMAT成功参与了最近在BIPM KCDB正式发布的 key comparison reference value (I)-S19 补充比对，得到了同行确认。与国际参考值的良好一致性表明，这一新实施的方法具有高度的稳健性和溯源独立性。
英文摘要
An independent air kerma traceability chain for $^{60}$Co radiation protection levels has been successfully established at the CIEMAT Ionizing Radiation Metrology Laboratory (LMRI-CIEMAT), based on the reference provided by the $^{137}$Cs primary standard. To achieve this, a secondary standard ionization chamber with an appropriate energy response was characterized, and its beam-quality correction factor, $k_Q$, was accurately determined via Monte Carlo simulations using the EGSnrc code. The method's accuracy was validated through a comparison with long-term historical calibration data and peer-confirmed through CIEMAT's successful participation in the EURAMET.RI(I)-S19 supplementary comparison, recently officially published in the BIPM KCDB. The excellent agreement achieved with international reference values demonstrates the high robustness and traceability independence of this newly implemented methodology.
