Update of the BIPM comparison BIPM.RI(II)-K1.Co-60 of activity measurements of the radionuclide 60Co to include the 2017 result of the PTB (Germany) and the 2018 result of the TAEK (Turkey)

• Published in: Metrologia 2021-01, Vol.58 (1A)
• Main Authors: Michotte, C, Courte, S, Nonis, M, Coulon, R, Judge, S, Kossert, K, Marganiec-Ga zka, J, Nähle, O, Yeltepe, E, Dirican, A
• Format: Article
• Language: English
• Subjects: Equivalence; Radioisotopes; Reference systems
• ISSN: 0026-1394; 1681-7575
• DOI: 10.1088/0026-1394/58/1A/06001

Main text Since 1976, 28 laboratories have submitted 72 samples of 60Co to the International Reference System (SIR) for activity comparison at the Bureau International des Poids et Mesures (BIPM), with comparison identifier BIPM.RI(II)- K1.Co-60. Recently, the PTB (Germany) and the TAEK (Turkey) participated in the comparison and the key comparison reference value (KCRV) has been updated to include the PTB result. The degrees of equivalence between each equivalent activity measured in the SIR and the updated KCRV have been calculated and the results are given in the form of a table. A graphical presentation is also given. 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).