Dosimeter properties of CaO transparent ceramic prepared by the SPS method

We have studied photoluminescence (PL), scintillation and thermally-stimulated luminescence (TSL) dosimeter properties of CaO transparent ceramic, in comparison with those of MgO transparent ceramic as a reference. Both samples were made by a Spark Plasma Sintering method. In the PL spectra, both samples showed emission peaks due to F and F⁺ centers. Moreover, in addition to these peaks, a scintillation emission peak was detected at 330 nm for both CaO and MgO, which was caused by surface defects. The TSL glow curves showed a main peak around 55 °C for CaO and 140 °C for MgO. The TSL response was confirmed to monotonically increase with irradiation dose over the dose range from 0.1 to 1000 mGy.