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Standardisation of 210Pb by Cerenkov counting.

Arinc, A; Johansson, L C; Gilligan, C R D; Pearce, A K (2011) Standardisation of 210Pb by Cerenkov counting. Appl. Radiat. Isot., 69 (5). pp. 768-772.

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A standard of 210Pb in solution was produced at the National Physical Laboratory by a novel technique combining Cerenkov counting with the established liquid scintillation efficiency tracing technique known as the Ciemat-NIST method. Coincidence counting was applied in order to benchmark the measurements and the activity concentrations of the solution determined with each technique are shown to be in agreement. Radiochemical separation of the 210Pb from its daughters was also necessary and the scheme for the separation is described. After performing this two-stage standardisation, the uncertainty was successfully lowered to 0.66 % (k=1). This uncertainty is approximately a factor of four lower than previously achieved (Woods et al., 2000. Appl. Radiat. Isot. 52., 381-385) by the classical method of standardisation of radionuclides, i.e. coincidence counting. Results and uncertainty budgets are reported in this paper.

Item Type: Article
Keywords: 210Pb, Cerenkov counting, liquid scintillation, coincidence counting
Subjects: Ionising Radiation
Ionising Radiation > Radioactivity
Identification number/DOI: 10.1016/j.apradiso.2011.01.007
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/4966

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