[20p-PB4-1~94] 2 放射線（ポスター）

▲ [20p-PB4-57] Optical and Scintillation properties of Pr-dope Gd₂Si₂O₇ 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

A scintillator is one of the luminescent materials which have an ability to convert high energy photons to the lower energy photons such as visible light or UV. The emitted photons will be collected by a photodetector and then converted into the electrical signal for radiation detection application. The single crystal type scintillators have the rare earth ions for a luminescence center, and Pr³⁺ is one of the highly interest ions for the luminescence center in the scintillator based on the property of a short scintillation decay time around 10-20 ns [2]. At the same time, gadolinium pyrosilicate Gd₂Si₂O₇ (GPS) is a great candidate in pyrosiligate type luminescent host, because of greater light output for gramma-rays and charged particles irradiations can be expected when they are doped with Ce³⁺. But the growth of the Gps single crystal was considered higher difficulty [3]. In the present work, the optical and scintillation properties of GPS single crystals grown by the floating zone (FZ) method with various Pr-doping concentrations had been evaluated with aim to investigate the optimum concentration.