Cross-validation of standardisation techniques at ANSTO using cobalt-60 and learnings from the presence and identification of non-gamma-ray emitting impurities.

Autor: van Wyngaardt WM; Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, 2234 NSW, Australia. Electronic address: freda.vanwyngaardt@ansto.gov.au., Bowan AHH; Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, 2234 NSW, Australia., Clark EL; Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, 2234 NSW, Australia., Keevers CMB; Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, 2234 NSW, Australia., Smith ML; Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, 2234 NSW, Australia., Zarifi M; Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, 2234 NSW, Australia., Stopic A; Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, 2234 NSW, Australia.
Jazyk: angličtina
Zdroj: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2023 Nov; Vol. 201, pp. 111027. Date of Electronic Publication: 2023 Sep 16.
DOI: 10.1016/j.apradiso.2023.111027
Abstrakt: To fulfil the technical requirements for accreditation to ISO/IEC 17025, the end-to-end validation of all processes associated with standardising 60 Co, including gravimetric source dispensing, primary standardisation by the 4π(LS)β-γ coincidence and live-timed anti-coincidence extrapolation techniques, and impurity determination were performed and documented. Pure-beta-emitting impurities in a 60 Co stock solution were identified. The impact of such impurities on measurement by liquid scintillation counting and comparison in the ESIR are discussed. A fresh 60 Co source was produced, standardised, and compared using the SIR.
Competing Interests: 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.
(Crown Copyright © 2023. Published by Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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