Update of the BIPM comparison BIPM.RI(II)-K1.Mn-54 of activity measurements of the radionuclide 54Mn to include the 2017 result of the PTB (Germany) and the linked results from the CCRI(II)-K2.Mn-54 comparison

Abstract

This report concerns an updated submission of a 54Mn standard by the Physikalisch-Technische Bundesanstalt (PTB) to the BIPM.RI(II)-K1.Mn-54 comparison. The result has been added to the previous results and this has produced a revised value for the key comparison reference value (KCRV), calculated using the power-moderated weighted mean. A link has been made to the CCRI(II)-K2.Mn-54 comparison held in 2003 by measurement of the K2 54Mn solution in the International Reference System (SIR). The degrees of equivalence between each equivalent activity measured in the SIR and the KCRV have been calculated for the remaining six NMIs in the BIPM.RI(II)-K1.Mn-54 comparison and the fourteen other participants in the CCRI(II)-K2.Mn-54 comparison. A graphical presentation is included.Main textTo 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).