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Decay correction of Nb-95.

Harms, A V; Johansson, L C; MacMahon, D (2009) Decay correction of Nb-95. Appl. Radiat. Isot., 67 (4). pp. 641-642.

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The 95Nb/95Zr activity ratio can be used to determine the date of a nuclear event. Several proficiency test exercises organised by the National Physical Laboratory (NPL), which included 95Zr, 95Nb and other gamma emitting radionuclides, showed in general relatively poor results for 95Nb, presumably caused by incorrect decay corrections. In this paper, a modified form of the Bateman equations taking account of the multiple branching of the parents 95Zr and 95mNb to determine the 95Nb activity concentration as a function of time is presented. The equations derived are not specific for the 95Zr/95mNb/95Nb decay chain, but can also be used for other branched decay chains (e.g., 133I/133mXe/133Xe).

Item Type: Article
Keywords: Nb-95, decay correction, Bateman, proficiency test exercise, nuclear event dating
Subjects: Ionising Radiation
Ionising Radiation > Radioactivity
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/4326

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