EGSnrc calculation of activity calibration factors for the Vinten ionization chamber

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1016/j.apradiso.2017.10.010
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Name affiliation
  1. National Research Council of Canada. Measurement Science and Standards
FormatText, Article
Journal titleApplied Radiation and Isotopes
ISSN0969-8043
Volume134
Pages100–104
Subjectionization chambers; Monte Carlo simulation; EGSnrc
Abstract
The National Physical Laboratory Vinten 671 chamber was selected as a proving ground for a new radionuclide source model in the EGSnrc software. The computational Vinten model is validated against measurements of radionuclide artifacts whose activities were determined by absolute methods. The response of the Vinten chamber is first calculated as a function of gamma energy, but more strikingly, an explicit simulation of radionuclide decay was implemented and now permits the direct determination of a calibration factor, including additional effects due to all decay paths of the radionuclide. The Monte Carlo and experimental calibration factors are found to agree at the percent level, in absolute terms.
Publication date
PublisherElsevier
LanguageEnglish
Peer reviewedYes
NPARC number23003044
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