C Kessler et al 2010 Metrologia 47 06005 doi:10.1088/0026-1394/47/1A/06005
C Kessler1, P J Allisy-Roberts1, J P McCaffrey2 and C K Ross2
Show affiliationsAn indirect comparison of the standards for air kerma of the National Research Council (NRC), Canada, and of the Bureau International des Poids et Mesures (BIPM) was carried out in the 60Co radiation beam of the BIPM in May 2009. The comparison result, based on the calibration coefficients for two transfer standards and expressed as a ratio of the NRC and the BIPM standards for air kerma, is 1.0032 with a combined standard uncertainty of 2.8 × 10−3. The result of the previous direct comparison in 60Co γ rays, made in 1998 and modified in 2007 was 1.0025 (27).
The degrees of equivalence between the NRC and the other participants in the key comparison have been calculated and the results are presented 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 Section I, according to the provisions of the CIPM Mutual Recognition Arrangement (MRA).
Issue 1A (Technical Supplement 2009)
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