title: Dose rate dependency of electronic personal dosemeters measuring X- and gamma-ray radiation.
abstract: 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.
authors.affiliation: Institute for National Measurement Standards, National Research Council of Canada, 1200 Montreal Road, M-35, Ottawa, K1A 0R6 Canada. john.mccaffrey@nrc-cnrc.gc.ca
authors.forename: J P
authors.initials: JP
authors.lastname: McCaffrey
authors.forename: H
authors.initials: H
authors.lastname: Shen
authors.forename: B
authors.initials: B
authors.lastname: Downton
mesh_terms: D002588:Cesium Radioisotopes / Q000032:analysis; D003037:Cobalt Radioisotopes / Q000032:analysis; D055615:Electrical Equipment and Supplies; D005720:Gamma Rays; D006801:Humans; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000295:instrumentation / Q000379:methods; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D014965:X-Rays
chemical_list: D002588:Cesium Radioisotopes; D003037:Cobalt Radioisotopes