Dosimetric, optical and radio-luminescence properties of Ce-doped 90KPO3-10Al2O3 glasses

Abstract

In this study, we evaluated the dosimetric and Radio-luminescence (RL) properties of Ce-doped 90KPO3-10Al2O3 glasses. The glass samples doped with different concentrations of Ce (0.05, 0.1, 0.5 and 1.0 mol%) were synthesized by the melt quenching method. The Ce-doped samples had high transmittance (80–90%) at wavelengths longer than 350 nm. From the measurements of photoluminescence (PL) decay curve, the luminescence decay time was confirmed to be typical for the 5d-4f transition of Ce3+ (30 ns). A similar decay time as that of PL was also confirmed in RL; therefore, the dominant emission origin of RL was ascribed to Ce3+. In addition, the samples showed thermally-stimulated luminescence, and the sensitivity of integrated signal over the glow curve was confirmed to range from 0.01 mGy to 1 Gy for the 0.5% Ce-doped sample which showed the highest sensitivity among the present materials.