Dose Metrology: TLD/OSL Dose Accuracy and Energy Response Performance

Performance evaluation and comparison in terms of measured dose accuracy, energy response, and coefficient of variation between two types of passive radiation dosimeters, thermoluminescent (TLD) and optically stimulated luminescence (OSL), used by workers in environments using ionizing radiation, for individual radiological monitoring and control of external exposure at different times (cumulative dose for 1 month), is a very important step to judge the quality and to identify the dosimetric aspects of TLD/OSL passive dosimeters and it is in this perspective that this study has been carried out. In fact this performance study consists in determining both the accuracy of the dose measurement R(10) and R(0.07) which is considered as the ratio of the measured dose (Hp(10) or Hp(0.07)) to the delivered dose (Hp(10) or Hp(0.07)) for each photon energy, the validity of the results of this test is based on the acceptance limits of the ICPR and the international standard ISO 62387, the relative energy response which is used to calculate the ratio of measured Hp(10) to delivered Hp(10), and Hp(0. 07) measured/Hp(0.07) normalized to 662 keV (Cs-137) energy to find which energy response is closest to the ideal case, and the coefficient of variation that allows to determine determine the statistical fluctuation of the doses found Hp(10)and Hp(0.07).