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- Title
The new international reference system for pure α- and pure β-emitting radionuclides and some electron capture decaying radionuclides by liquid scintillation counting.
- Authors
Coulon, Romain; Broda, Ryszard; Cassette, Philippe; Courte, Sammy; Dupire, Aldo; Jerome, Simon; Judge, Steven; Kossert, Karsten; Liu, Haoran; Michotte, Carine; Nonis, Manuel
- Abstract
The Bureau International des Poids et Mesures (BIPM) is developing, with the support of national metrology institutes, an extension to the existing international reference system for international comparisons in radionuclide metrology. The extended system is addressing pure α-, pure β-emitting and some electron capture-decaying radionuclides. The new system is based on a custom-built liquid scintillation counter and the triple-to-double coincidence ratio (TDCR) technique. Particular emphasis was placed on long-term stability and excellent reproducibility in sample preparation. The analytical method is based on a special approach that uses the TDCR value as a parameter to compensate for fluctuations caused by changes in detection efficiency or photomultiplier asymmetries that cannot be excluded when considering very long periods. Measures for quality assurance were established. They are based on periodic controls of unquenched toluene-based liquid scintillation sources with 3H and 14C. In this way, the reproducibility of the system results is demonstrated for a test period of about twenty months.
- Subjects
ELECTRON capture; LIQUID scintillation counting; RADIOISOTOPES; COINCIDENCE circuits
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2022, Vol 331, Issue 8, p3221
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-022-08337-7