[25p-F407-1~15] 2.5 放射線誘起蛍光体

▲ [25p-F407-12] Ce concentration dependence on scintillation properties of Ce-doped yttrium pyrosilicate single crystal

〇(DC)Prom Kantuptim¹、Daisuke Nakauchi¹、Takumi Kato¹、Noriaki Kawaguchi¹、Takayuki Yanagida¹ (1.NAIST)

キーワード：scintillator, Ce3+, YPS

The scintillator is one of the phosphor materials that can convert the high energy ionizing radiations such as photons (X- or γ-ray), neutron, or charged particles into lower-energy photons such as ultraviolet, visible, and near-infrared light. The combination of scintillator and photodetector has been widely used for radiation measuring instruments in many scientific fields. In 2003, the Ce-doped Lu₂Si₂O₇ study presented the high light yield of 26,300 ph/MeV with a fast decay time of 40 ns. With a similar crystal structure, the Lu substitution for Y such as Y₂Si₂O₇ (YPS) is expected to have interesting scintillation properties similar with our previous study on Pr-doped YPS. This study also has the aim to be one of the first reports on Ce concentration dependence of PL and scintillation properties on Ce-doped YPS single crystal. The selected range of Ce-concentration is from 0.5 to 10.0 %. Both PL and scintillation properties are systematically carried out including PL emission map, PL decay time, X-ray-induced scintillation spectra and decay time, afterglow analysis, γ-ray-irradiated pulse-height spectra, and absolute scintillation light yield. This investigation of this study will lead to the better optimized Ce-doped YPS for use as the scintillator in the scintillation detector.