[20p-PB4-1~94] 2 放射線（ポスター）

▲ [20p-PB4-56] Optical and Scintillation properties of Pr-doped Y₂Si₂O₇ single crystals by the floating zone method

〇(M1)Prom Kantuptim¹、Masaki Akatsuka¹、Noriaki Kawaguchi¹、Takayuki Yanagida¹ (1.NAIST)

キーワード：Scintillator, Single crystal

The Scintillator material is a luminescent material emitting photons such as ultraviolet and visible light from the excitation by high energy photons or charge particles [1]. The emitted photons will be collected by a photodetector then converted to the electrical signal for radiation detection purpose. The single crystal type scintillators using the rare earth ions as the luminescence center have been widely used. Among rare earth ions, Pr³⁺ is one of the suitable ions for this purpose from the result of fast scintillation decay time around 10-20 ns [2]. In other side, yttrium pyrosilicate Y₂Si₂O₇ (YPS) is a potential host for luminescent materials including scintillators because of high luminescence efficiency as well as thermal and chemical stability studied for upconversion [3].
In this study, we investigated both physical and scintillation properties of YPS single crystals grown form the floating zone method with a variation of Pr-doping concentrations to investigate the optimum concentration as a scintillator purpose.