A New Personal Dosimetry Badge Based on Combined Luminescence Techniques (Tl and OSL)

TL and OSL dosimeters have been widely employed in the individual monitoring of occupational doses. While personal dosimetry systems based on TL technique make use of a variety of materials and commercial readers available, OSL dosimetry systems explore the optical nature and speed of the readout process, in addition to the possibility of successive readings of the detectors without significant signal loss. In this work, we proposed a new personal dosimetry badge based on different combinations of TL and OSL detectors employing the advantages of both combined techniques for assessment of occupational photon radiation exposures. The badge was made of a material with low density through a 3D printer and it was designed so that one pair of detectors could be read using OSL and TL commercial readers available. Two combinations of TL and OSL detectors (CaSO₄/BeO and Al₂O₃/LiF) were used in developing this badge, performing a series of tests in accordance with international standards/criteria. Preliminary results showed that corrections with respect to energy can be carried out through ratio between OSL and TL responses from detectors employed in the badge with reduced angular dependence, without the use of attenuation filters. Moreover, it was possible evaluate simultaneously single and accumulated dose over time and to improve the doses estimation combining the techniques. (author)