Dosimetric properties of a personal dosimetry system based on radio-photoluminescence of silver doped phosphate glass

In the presented study, the relative response of a commercially available RPL glass dosemeter system, developed for individual monitoring of external ionizing radiation, was determined for different photon and beta radiation qualities, varying angle of incidence of photon radiation, and for combined photon irradiations. For 137Cs radiation quality the Hp(10) and Hp(0.07) relative responses vary between 90% and 100% from 0.1 mSv up to 5 Sv. In the photon energy range from 33 keV to 1250 keV the Hp(10) variation is less than 10%. The Hp(0.07) variation is less than 10% for photon energies higher than 12 keV. The response of both dose quantities varies less than 15% for angle of incidence up to 60° for 137Cs and N-80 photon radiation qualities. For beta radiation the relative response of Hp(0.07) was determined to be 1.03 for 90Sr+90Y, 0.98 for 85Kr, and 0.48 for 147Pm. Under combined irradiation conditions with differing radiation qualities and angles of incidence, the dose accuracy was within ±50%. The precision of the RPL dosimetry system in Hp(0.07) and Hp(10) is better than 2% for radiation quality 137Cs and doses greater than 0.5 mSv.