Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Update of the BIPM comparison BIPM.RI(II)-K1.Co-60 of activity measurements of the radionuclide 60Co to include the 2020 result of the PTB (Germany), the 2020 result of the NIST (United States), the 2020 result of the SMU (Slovakia), the 2021 result of th

Published

Author(s)

R Coulon, C Michotte, S Courte, M Nonis, F van Wyngaardt, M Smith, A Bowan, C Keevers, E Clark, M Zarifi, A Ravindra, DB Kulkarni, R Sharma, Marco Capogni, P De Felice, M Capone, P Carconi, A Fazio, C Bobin, R Lins da Silva, A Leiras, J de Almeida Rangel, M Aguiar Leobino da Silva, A Iwahara, Denis E. Bergeron, Jeffrey T. Cessna, Ryan P. Fitzgerald, Lizbeth Laureano-Perez, Leticia Pibida, MW Van Rooy, Jf Lubbe, MJ van Staden, John Keightley, A Pearce, N Ramirez, E Bendall, S Collins, T Ziemek, E Lech, P Saganowski, M Czudek, A Listkowska, O Nahle, Karsten Kossert, M Takacs, M Krivosik, I Bonkova

Abstract

Since 1976, 30 laboratories have submitted 85 samples of 60Co to the International Reference System (SIR) for activity comparison at the Bureau International des Poids et Mesures (BIPM), with comparison identi_er BIPM.RI(II)-K1.Co-60. Recently, the PTB (Germany), the NIST (United States), the SMU (Slovakia), the BARC (India), the LNE-LNHB (France), the POLATOM (Poland), the ENEA-INMRI (Italy), the NPL (United Kingdom), the LNMRI-IRD (Brazil), the NMISA (South Africa) and the ANSTO (Australia) participated in the comparison and the key comparison reference value (KCRV) has been updated. 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 representation is also given.
Citation
Metrologia

Keywords

Cobalt-60, activity, key comparison

Citation

Coulon, R. , Michotte, C. , Courte, S. , Nonis, M. , van Wyngaardt, F. , Smith, M. , Bowan, A. , Keevers, C. , Clark, E. , Zarifi, M. , Ravindra, A. , Kulkarni, D. , Sharma, R. , Capogni, M. , De Felice, P. , Capone, M. , Carconi, P. , Fazio, A. , Bobin, C. , Lins da Silva, R. , Leiras, A. , de Almeida Rangel, J. , Aguiar Leobino da Silva, M. , Iwahara, A. , Bergeron, D. , Cessna, J. , Fitzgerald, R. , Laureano-Perez, L. , Pibida, L. , Van Rooy, M. , Lubbe, J. , van Staden, M. , Keightley, J. , Pearce, A. , Ramirez, N. , Bendall, E. , Collins, S. , Ziemek, T. , Lech, E. , Saganowski, P. , Czudek, M. , Listkowska, A. , Nahle, O. , Kossert, K. , Takacs, M. , Krivosik, M. and Bonkova, I. (2023), Update of the BIPM comparison BIPM.RI(II)-K1.Co-60 of activity measurements of the radionuclide 60Co to include the 2020 result of the PTB (Germany), the 2020 result of the NIST (United States), the 2020 result of the SMU (Slovakia), the 2021 result of th, Metrologia, [online], https://doi.org/10.1088/0026-1394/60/1A/06010, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935964 (Accessed May 19, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created March 20, 2023, Updated May 14, 2024