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Radiation Protection Dosimetry Advance Access first published online on April 16, 2008
This version published online on September 18, 2008
Radiation Protection Dosimetry, doi:10.1093/rpd/ncn133
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© 2008 National Research Council of Canada and Canadian Crown Copyright

DOSE RATE DEPENDENCY OF ELECTRONIC PERSONAL DOSEMETERS MEASURING X- AND {gamma}-RAY RADIATION

J. P. McCaffrey*, H. Shen and B. Downton

Institute for National Measurement Standards, National Research Council of Canada, 1200 Montreal Road, M-35, Ottawa, K1A 0R6 Canada

* Corresponding author: john.mccaffrey{at}nrc-cnrc.gc.ca

Received January 30, 2008, amended March 12, 2008, accepted March 13, 2008

Three models of electronic personal dosemeters (EPDs)—Siemens Mk 2.3, Rados RAD-60S and Vertec Bleeper Sv—were irradiated with seven photon beam qualities: 60Co, 137Cs and the ISO narrow spectrum series X-ray qualities N-250, N-200, N-150, N-60 and N-20. The personal dose equivalent rates delivered to the devices varied between 0.002 and 0.25 mSv s–1. Measurements were made with the EPDs mounted free-in-air as well as against Lucite and water phantoms. Results for all models of EPDs showed differences in personal dose equivalent energy response for different energies covered by this range of radiation qualities, with different models showing variations from 15 to 65%. In some cases, the personal dose equivalent rate response of these devices varied by a factor of 3 between irradiations at typical calibration dose rates and those normally encountered by nuclear energy workers.

This version changes the last radiation quality in Table 1 from 6 to 60Co


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