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Townson R, Tessier F, Galea R. EGSnrc calculation of activity calibration factors for the Vinten ionization chamber. Appl Radiat Isot. 2017;134:100-104doi: 10.1016/j.apradiso.2017.10.010.
Townson, R., Tessier, F., & Galea, R. (2018). EGSnrc calculation of activity calibration factors for the Vinten ionization chamber. Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 134100-104. https://doi.org/10.1016/j.apradiso.2017.10.010
Townson, R, et al. "EGSnrc calculation of activity calibration factors for the Vinten ionization chamber." Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine vol. 134 (2018): 100-104. doi: https://doi.org/10.1016/j.apradiso.2017.10.010
Townson R, Tessier F, Galea R. EGSnrc calculation of activity calibration factors for the Vinten ionization chamber. Appl Radiat Isot. 2018 Apr;134:100-104. doi: 10.1016/j.apradiso.2017.10.010. Epub 2017 Oct 06. PMID: 29042149.
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Appl Radiat Isot. 2018 Apr;134:100-104. doi: 10.1016/j.apradiso.2017.10.010. Epub 2017 Oct 06.

EGSnrc calculation of activity calibration factors for the Vinten ionization chamber.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

R Townson, F Tessier, R Galea

Affiliations

  1. Measurement Science and Standards, National Research Council Canada, 1200 Montreal Road, Building M-35, Ottawa, ON, Canada K1A0R6.
  2. Measurement Science and Standards, National Research Council Canada, 1200 Montreal Road, Building M-35, Ottawa, ON, Canada K1A0R6. Electronic address: [email protected].

PMID: 29042149 DOI: 10.1016/j.apradiso.2017.10.010

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.

Crown Copyright © 2017. Published by Elsevier Ltd. All rights reserved.

Keywords: EGSnrc; Ionization chambers; Monte Carlo simulation

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