Abstract
Since 1977, eight national metrology institutes and three other laboratories have submitted 26 samples of known activity of 51Cr to the International Reference System (SIR) for activity comparison at the Bureau International des Poids et Mesures. The activities ranged from about 3 MBq to 90 MBq. The degrees of equivalence between each equivalent activity measured in the SIR and the key comparison reference value (KCRV) have been calculated and the results are given in the form of a matrix for nine laboratories. A graphical presentation is also given.
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 databasekcdb.bipm.org/.
The final report has been peer-reviewed and approved for publication by Section II of the Consultative Committee for Ionizing Radiation (CCRI(II)), comparison identifier BIPM.RI(II)-K1.Cr-51, according to the provisions of the Mutual Recognition Arrangement (MRA).