Published January 2022 | Version v1
Journal article Metadata-only

Update of the BIPM comparison BIPM.RI(II)-K1.Co-57 of activity measurements of the radionuclide 57Co to include the 2013 result of the POLATOM (Poland), the 2015 result of the NMISA (South Africa), the 2021 result of the CMI (Czech Republic), and to link the CCRI(II)-S6.Co-57 comparison

Creators

  • 1. Bureau International des Poids et Mesures, Sevres (France)
  • 2. National Centre for Nuclear Research Radioisotope Centre POLATOM, 05-400 Otwock (Poland)
  • 3. National Metrology Institute of South Africa, Cape Town (South Africa)
  • 4. Czech Metrological Institute - Inspectorate for Ionizing Radiation (Czech Republic)
  • 5. National Institute of Standards and Technology, Gaithersburg (United States)

Description

Three new participations in the BIPM.RI(II)-K1.Co-57 comparison have been added to the previous results and this has produced a revised value for the key comparison reference value (KCRV), calculated using the power-moderated weighted mean. A link has been made to the CCRI(II)-S6.Co-57 comparison piloted by the International Atomic Energy Agency (IAEA) in 2008 for which one sample of the 57Co radioactive solution was sent to the SIR. Two NMIs used the S6 comparison to update their degree of equivalence. The degrees of equivalence between each equivalent activity measured in the International Reference System (SIR) and the KCRV have been calculated and the results are given in the form of a table for the remaining seven NMIs in the BIPM.RI(II)-K1.Co-57 comparison and the three eligible participants in the CCRI(II)- S6.Co-57 comparison. A graphical presentation is also given. (author)

Additional details

Identifiers

DOI
10.1088/0026-1394/59/1A/06015;

Publishing Information

Journal Title
Metrologia
Journal Volume
59
Journal Issue
no.1A
Journal Page Range
p. 06015.1-06015.30
ISSN
0026-1394

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
55011972
Subject category
S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
Descriptors DEI
COBALT 57; COMPARATIVE EVALUATIONS; NUCLEAR ENERGY
Descriptors DEC
BETA DECAY RADIOISOTOPES; COBALT ISOTOPES; DAYS LIVING RADIOISOTOPES; ELECTRON CAPTURE RADIOISOTOPES; ENERGY; EVALUATION; INTERMEDIATE MASS NUCLEI; ISOTOPES; NUCLEI; ODD-EVEN NUCLEI; RADIOISOTOPES

Optional Information

Notes
12 refs.