Abstract. Since 1978, eight national metrology institutes (NMIs) and one other laboratory have submitted 15 samples of known activity of ⁶⁷Ga to the International Reference System (SIR) for activity comparison at the Bureau International des Poids et Mesures in the ongoing key comparison, BIPM.RI(II)-K1.Ga-67. The activities ranged from about 3 MBq to 600 MBq. The recent submission from the LNE–LNHB, France, replaces their earlier result in the key comparison database for this comparison. The key comparison reference value (KCRV) has been recalculated and the degrees of equivalence between each equivalent activity measured in the SIR are given in the form of a matrix. 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 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 (MRA).