[20p-PB4-1~94] 2 放射線（ポスター）

▲ [20p-PB4-55] Optical and Scintillation properties of Pr-doped Lu₂Si₂O₇ 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

Scintillator material is one of the luminescent materials which can convert high energy photons or charged particles to the lower energy photons such as ultraviolet and visible light immediately after the absorption of the ionizing radiation [1]. The emitted photons will be collected by a photodetector such as a photomultiplier tube (PMT) or photodiode (PD) into the electrical signal for radiation detection purposes. The single crystal type scintillators using the rare earth ions as the luminescence center have been commonly used. Among rare earth ions, Pr³⁺ is one of the attractive ions for this purpose from the result of fast scintillation decay time around 10-20 ns [2]. In addition, Lu₂Si₂O₇ (LPS) had been used for the host materials due to the high effective atomic number, and it presents good comprehensive features such as short decay time and high light yield when it is activated by Ce³⁺ and Pr³⁺ ions [3].
In this work, we investigated the physical and scintillation properties of LPS single crystals with different Pr-doping concentrations that have been fabricated by the floating zone method to investigate the optimum concentration as a scintillator use.