Coulon Romain, Leobino da Silva Monica Aguiar, Bendall Emma, Bergeron Denis E, Bobin Christophe, Bonková Ivana, Bowan Angus H H, Ryszard Broda, Capogni Marco, Capone Mauro, Carconi Pierluigi, Cassette Philippe, Jeffrey T Cessna, Clark Emily L, Collins Sean, Courte Sammy, Czudek Marek, da Silva Carlos José, de Almeida Rangel Johnny, De Felice Pierino, Fan Fuyou, Fazio Aldo, Fitzgerald Ryan P, Fréchou Carole, Galea Raphael, Gressier Vincent, Iwahara Akira, Judge Steven M, Keevers Christine M B, Keightley John, Kossert Karsten, Krivošík Matej, Kulkarni D B, Laureano-Perez Lizbeth, Lech Edyta, Leiras Anderson, Liang Juncheng, Lima da Cruz Paulo Alberto, Lins da Silva Ronaldo, Listkowska Anna, Liu Haoran, Liu Meiling, Lubbe Joline, Michotte Carine, Moore Kimberly, Nähle Ole, Nonis Manuel, Pearce Andy, Pibida Leticia, Quadros André L L, Ramirez Natasha, Ravindra Anuradha, Sabot Benoit, Saganowski Paweł, Sathian V, Smith Michael L, Sharma Ritu, Takács Marcell P, van Rooy Milton W, Shearman Robert, van Staden Martin J, van Wyngaardt W M, Yang Zhijie, Zarifi Melek, Zhang Ming, Ziemek Tomasz
Bureau International des Poids et Mesures, Pavillon de Breteuil, F-92312, Sèvres Cedex, France.
Laboratório Nacional de Metrologia das Radiações Ionizantes, Instituto de Radioproteção e Dosimetria, LNMRI/IRD, Av. Salvador Allende, 3773, CEP 22783-127, Barra da Tijuca, Rio de Janeiro, RJ, Brazil.
Appl Radiat Isot. 2023 Oct;200:110945. doi: 10.1016/j.apradiso.2023.110945. Epub 2023 Jul 26.
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, 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.
国际计量局（BIPM）正在研发一种新的传递仪器，以将其用于评估放射性标准国际等效性的集中服务扩展到新的放射性核素。一种采用三重/双重符合比法的液体闪烁计数器正在CCRI(II)-P1的Co-60试点研究中进行研究和测试。该试点研究有13个具备初级校准能力的参与实验室，对照自1976年以来一直运行的基于电离室的原始国际参考系统验证了该方法。结果一致，且达到了适用于目标的低于5×10的准确度。该试点研究还揭示了标准溶液中存在发射低能电子的杂质时出现的一个问题，与其他初级测量方法相比，这些杂质对液体闪烁计数有不同的影响。
