Dosimetric, optical and radio-luminescence properties of Ce-doped 90KPO3-10Al2O3 glasses
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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.
This work was supported by Grant-in-Aid for Scientific Research (A) (17H01375) from the Ministry of Education, Culture, Sports, Science and Technology of the Japanese government (MEXT) as well as A-STEP from Japan Science and Technology Agency (JST). The Cooperative Research Project of Research Institute of Electronics, Shizuoka University, Terumo Foundation for Life Sciences and Arts, Izumi Science and Technology Foundation, SEI Group CSR Foundation, and The Iwatani Naoji Foundation are also acknowledged.
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