Primary standardisation of technetium-99m by liquid scintillation coincidence counting.

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., Tobin SM; Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, 2234, NSW, Australia., Lee S; 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., Jackson TW; Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, 2234, NSW, Australia., Ilter J; Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, 2234, NSW, Australia., Howe B; Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, 2234, NSW, Australia., Sarbutt 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] 2020 Feb; Vol. 156, pp. 108935. Date of Electronic Publication: 2019 Oct 13.
DOI: 10.1016/j.apradiso.2019.108935
Abstrakt: Technetium-99m was standardised by the 4π(LS)ce-γ coincidence extrapolation method. Sensitivity of the 4π(LS) channel to two types of radiation, namely conversion electrons and γ-rays, resulted in incorrect activity values being obtained when this was not adequately accounted for. Measurements were more robust when the LS detection efficiency was optimised, and when a γ-window setting was used that monitored the combined LS efficiency for conversion electrons and γ-rays. The primary standard was internationally compared through participation in the BIPM.RI(II)-K4.Tc99m key comparison.
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.
(Copyright © 2019 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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