Dosimetric properties of Y-doped MgO transparent ceramics

We have prepared Y-doped (0.001, 0.01 and 0.1%) MgO samples by using a Spark Plasma Sintering (SPS) method. Subsequently, photoluminescence (PL), scintillation and thermally-stimulated luminescence (TSL) dosimetric properties were investigated. The PL emission peak appeared around 410 nm in all the samples. The PL decay time constants at 410 nm were ∼10 and ∼100 ns which were on the typical order of the emission from F+ centers in the undoped MgO. Scintillation emission peaks were detected at 330, 400 and 760 nm under X-rays irradiations. Compared with TSL glow curve of undoped MgO, a glow peak around 140 °C shifted to high temperature in proportion to dopant concentration, and it was shown at 152 °C in 0.1% Y-doped sample. The TSL response was confirmed to be linear to the irradiation dose over the dose range from 0.1 to 1000 mGy.