Evaluation of optical and radio-photoluminescence properties in Ag-doped 30KPO₃–70Al(PO₃)₃ glasses

Abstract

We prepared glass samples with a chemical composition of 30KPO₃–70Al(PO₃)₃ by the melt quenching method. As a radio-photoluminescence (RPL) emission center, Ag₂O (0, 0.1, 0.3, 1.0 and 3.0%) was doped in these glasses. Before X-ray irradiation, Ag-doped samples showed a blue luminescence upon 254 nm excitation while they exhibited an orangish luminescence upon 304 nm excitation after X-ray irradiation. We evaluated dosimeter properties such as dose response properties of RPL, fading and thermally stimulated luminescence (TSL) glow curves. Dose response function in RPL emission indicated the lower detection limit of 100 mGy. In addition, TSL glow curve of Ag-doped 30KPO₃–70Al(PO₃)₃ showed that accumulated carriers in the samples were released at around 85°C and easily re-excited at room temperature.