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Activity measurements of the radionuclide 57Co for the NMIJ, Japan and the PTB, Germany in the ongoing comparison BIPM.RI(II)-K1.Co-57

G Ratel1, C Michotte1, Y Hino2, K Kossert3 and H Janßen3

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KEY COMPARISON

Since 2004, the National Metrology Institute of Japan (NMIJ) and the Physikalisch-Technische Bundesanstalt (PTB) have submitted samples of known activity of 57Co to the International Reference System (SIR). The values of the activity submitted were about 1.8 MBq and 1.3 MBq respectively. These key comparison results have replaced the previous results for Japan and Germany in the matrix of degrees of equivalence in the key comparison database that contains 14 results, identifier BIPM.RI(II)-K1.Co-57.

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 Section II of the Consultative Committee for Ionizing Radiation (CCRI(II)), according to the provisions of the Mutual Recognition Arrangement (MRA).


Dates

Issue 1A ( 1 January 2005)



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