Abstract：In order to promote the unification of measurement values in the field of low-energy X-ray air kerma measurement in China and achieve international equivalence, National Institute of Metrology, China (NIM) measured the air kerma of low-energy X-ray absolutely with a plate free air ionization chamber which is the primary standard in 2018. Two transfer ionization chambers named Radcal-RC6M were calibrated in low energy X-ray radiation field at NIM and BIPM. The comparison results are equivalent to those of the BIPM within the range of 0.37% of the relative standard uncertainty. The comparison results have been included in the key comparison database (KCDB) of the BIPM.
赵瑞,吴金杰,樊松,王培玮,余继利. 低能X射线空气比释动能国际关键比对[J]. 计量学报, 2022, 43(10): 1359-1365.
ZHAO Rui,WU Jin-jie,FAN Song,WANG Pei-wei,YU Ji-li. Key Comparison of the Air-kerma of the NIM and the BIPM in Low-energy X-rays. Acta Metrologica Sinica, 2022, 43(10): 1359-1365.
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2022, Vol. 43 
