Characterization of active personal dosimeter in terms of Hp(10) for X and gamma radiation beams

The use of active personal dosimeters (APDs) is becoming more widespread in hospitals, generally found to be beneficial due to instant reading and useful for optimization purposes. In this study, three active personal dosimeters of Polimaster® model RadFlash® were chosen for characterization in terms of H_p(10) according to reference conditions of ISO 4037-3 (ISO, 2019b). The dosimeters were irradiated in X and gamma reference radiation defined in the ISO 4037-1 standard (ISO, 2019a), using the gamma irradiator and X-ray irradiator GE Isovolt 160, both located at the Dosimeter Calibration Laboratory (LCD) of the Center for Development of Nuclear Technology (CDTN). The repeatability of RadFlash® APDs resulted in a dosimeter percentage difference smaller than 5 %. The energy and angular response of each RadFlash® APD is within the interval from 0.71 to 1.67 for photon energies above or equal to 50 keV, considered adequate according to IEC 61526 standard (IEC, 2024).