Risø calibration quartz textendash A challenge for β-source calibration. An applied study with relevance for luminescence dating

Authors Organisations
  • Annette Kadereit(Author)
    University of Heidelberg
  • Sebastian Kreutzer(Author)
    Giessen University
    University of Bayreuth
Type Article
Original languageEnglish
Pages (from-to)2238-2250
Number of pages13
JournalMeasurement
Volume46
Issue number7
Early online date21 Mar 2013
DOI
Publication statusPublished - 01 Aug 2013
Externally publishedYes
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Abstract

Risø calibration quartz (RCQ) is used worldwide in luminescence laboratories to calibrate β-sources. RCQ is advantageous because the inherent γ-dose is determined conveniently with a blue light stimulated luminescence (BLSL) single aliquot regeneration (SAR) protocol and dose equivalents (DEs) are highly reproducible with standard errors of the mean of usually <2%. We report on a series of tests on the recoverability of known β-doses from RCQ and on DE-determination of γ-dosed RCQ with varying SAR-measurement parameters. Evaluated alone, these raise doubt whether the precise calibration results are systematically correct. However, it is likely that cutheat and preheat adjustment of ‘quick calibration’ as applied by staff members of the Radiation Research Division of the Technical University of Denmark when installing a new luminescence reader in a customer’s laboratory are appropriate to minimize systematic errors. This finding is suggested by comparative calibration of a β-source with RCQ and another γ-irradiated quartz

Keywords

  • luminescence dating, β-source calibration, Risø calibration quartz