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

2023; Elsevier BV; Volume: 200; Linguagem: Inglês

10.1016/j.apradiso.2023.110945

1872-9800

Romain Coulon, Monica Aguiar Leobino da Silva, Emma Bendall, Denis E. Bergeron, Christophe Bobin, Ivana Bonková, Angus H.H. Bowan, Broda Ryszard, M. Capogni, Mauro Capone, P. Carconi, P. Cassette, T. Cessna Jeffrey, Emily L. Clark, S.M. Collins, S Courte, Marek Czudek, Carlos José da Silva, Johnny de Almeida Rangel, P. De Felice, Fuyou Fan, A. Fazio, Ryan Fitzgerald, C Fréchou, R. Galea, Vincent Gressier, Akira Iwahara, Steven Judge, Christine M.B. Keevers, J D Keightley, Karsten Kossert, Matej Krivošík, D.B. Kulkarni, Lizbeth Laureano-Pérez, Edyta Lech, Anderson Leiras, Juncheng Liang, Paulo Alberto Lima da Cruz, Ronaldo Lins da Silva, A. Listkowska, Haoran Liu, Meiling Liu, Joline Lubbe, C Michotte, Kimberly Moore, O. Nähle, Manuel Nonis, Andy Pearce, L. Pibida, André Luiz Lopes Quadros, Natasha Ramirez, Anuradha Ravindra, Benoît Sabot, Paweł Saganowski, V. Sathian, M. L. Smith, Ritu Sharma, M. P. Takács, M.W. van Rooy, R. C. Shearman, Martin J. van Staden, W.M. van Wyngaardt, Zhijie Yang, Melek Zarifi, Ming Zhang, Tomasz Ziemek,

Scientific Measurement and Uncertainty Evaluation

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.