Characterization of OSL commercial dosimeters using a hand phantom, in standard beta radiation beams

In this study, a hand phantom was developed and tested with Al2O3:C detectors (nanodots, Landauer) and the optically stimulated luminescence (OSL) technique. This paper shows the results of a characterization study of Al2O3:C detectors at the hand phantom, to simulate operations at a nuclear medicine service. The OSL detectors were exposed to standard beta radiation beans of the beta secondary standard system of the Calibration Laboratory at IPEN, with 90Sr + 90Y, 85Kr and 147Pm sources. The detectors were optically treated prior each reutilization. The results obtained show that for monitoring of workers exposed to beta radiation, the technique and the material are useful, but the energy dependence of the OSL response of Al2O3: C has to be taken into consideration. (author)