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. 2023 Oct:200:110945.
doi: 10.1016/j.apradiso.2023.110945. Epub 2023 Jul 26.

The international reference system for beta-particle emitting radionuclides: Validation through the pilot study CCRI(II)-P1.Co-60

Romain Coulon  1 , Monica Aguiar Leobino da Silva  2 , Emma Bendall  3 , Denis E Bergeron  4 , Christophe Bobin  5 , Ivana Bonková  6 , Angus H H Bowan  7 , Broda Ryszard  8 , Marco Capogni  9 , Mauro Capone  9 , Pierluigi Carconi  9 , Philippe Cassette  5 , T Cessna Jeffrey  4 , Emily L Clark  7 , Sean Collins  3 , Sammy Courte  10 , Marek Czudek  8 , Carlos José da Silva  2 , Johnny de Almeida Rangel  2 , Pierino De Felice  9 , Fuyou Fan  11 , Aldo Fazio  9 , Ryan P Fitzgerald  4 , Carole Fréchou  5 , Raphael Galea  12 , Vincent Gressier  10 , Akira Iwahara  2 , Steven M Judge  10 , Christine M B Keevers  7 , John Keightley  3 , Karsten Kossert  13 , Matej Krivošík  6 , D B Kulkarni  14 , Lizbeth Laureano-Perez  4 , Edyta Lech  8 , Anderson Leiras  2 , Juncheng Liang  11 , Paulo Alberto Lima da Cruz  2 , Ronaldo Lins da Silva  2 , Anna Listkowska  8 , Haoran Liu  11 , Meiling Liu  11 , Joline Lubbe  15 , Carine Michotte  10 , Kimberly Moore  12 , Ole Nähle  13 , Manuel Nonis  10 , Andy Pearce  3 , Leticia Pibida  4 , André L L Quadros  2 , Natasha Ramirez  3 , Anuradha Ravindra  14 , Benoit Sabot  5 , Paweł Saganowski  8 , V Sathian  14 , Michael L Smith  7 , Ritu Sharma  14 , Marcell P Takács  13 , Milton W van Rooy  15 , Robert Shearman  3 , Martin J van Staden  15 , W M van Wyngaardt  7 , Zhijie Yang  11 , Melek Zarifi  7 , Ming Zhang  11 , Tomasz Ziemek  8
Affiliations

The international reference system for beta-particle emitting radionuclides: Validation through the pilot study CCRI(II)-P1.Co-60

Romain Coulon et al. Appl Radiat Isot. 2023 Oct.

Abstract

The Bureau International des Poids et Mesures (BIPM) is developing a new transfer instrument to extend its centralized services for assessing the international equivalence of radioactive standards to new radionuclides. A liquid scintillation counter using the triple/double coincidence ratio method is being studied and tested in the CCRI(II)-P1.Co-60 pilot study. The pilot study, involving 13 participating laboratories with primary calibration capabilities, validated the approach against the original international reference system based on ionization chambers, which has been in operation since 1976. The results are in agreement and an accuracy suitable for purpose, below 5×10-4, is achieved. The pilot study also reveals an issue when impurities emitting low-energy electrons are present in the standard solution, which have a different impact on liquid scintillation counting compared to other primary measurement methods.

Keywords: ESIR; International system of reference; Liquid scintillation counting; Radionuclide metrology; SIR; Standardization.

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Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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