Design of a TL personal dosimeter identifiable PA exposure and development of its dose evaluation algorithm

A single-dosimeter worn on the anterior surface of body of a worker was found to provide significant underestimation of dose to the worker when radiation comes from behind of human body. Recently, several researchers suggested that this kind of underestimation can be corrected to a certain extent by using an extra dosimeter on the back. But these multiple dosimetry also have the disadvantages like overestimation or cost burden. In this study, a single dosimeter introducing asymmetric filters enabled to identify PA exposure was designed and its dose evaluation algorithm for AP-PA mixed radiation field was established. A prototype TL personal dosimeter was designed and manufactured by Monte-Carlo simulation and experiment. It was assured that TL personal dosimeter and dose evaluation algorithm developed in this study showed excellent performance by fulfilling simplified performance test and comparing commercial dosimeters. This algorithm were applicable to penetrating radiation had the effective energy more than 100 keV. Besides, the dosimeter and algorithm in this study were possible to be applied to near PA exposure