Key comparison BIPM.RI(I)-K3 of the air-kerma standards of the NPL, UK, and the BIPM in medium-energy x-rays

Abstract

A key comparison has been made between the air-kerma standards of the NPL, UK, and the BIPM in the medium-energy x-ray range. The results show the standards to be in agreement at the level of the standard uncertainty of the comparison of 3.4 parts in 103, with some evidence of a dependence on radiation quality. The results are analysed and presented in terms of degrees of equivalence, suitable for entry in the BIPM key comparison database. KEY WORDS FOR SEARCH Radiation dosimetry, air kerma, comparison, medium-energy x-rays Main text 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 kcdb.bipm.org/. 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).