Abstract
Since 2008, three national metrology institutes have submitted ampoules for the measurement of 134Cs in the International Reference System (SIR). The values of the activity submitted were between about 0.17 MBq and 2.3 MBq. The primary standardization result for the IRA, Switzerland, replaces their earlier result of 1978 but no change is proposed for the key comparison reference value at the present time. There are now 14 results in the BIPM.RI(II)-K1.Cs-134 comparison.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 (CIPM MRA).
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