[14p-PA2-1~86] 2 Ionizing Radiation

▲ [14p-PA2-34] Scintillation properties of Sm and Eu-doped Lu₂Si₂O₇ single crystal

〇(M2)Prom Kantuptim¹, Masaki Akatsuka¹, Daisuke Nakauchi¹, Takumi Kato¹, Noriaki Kawaguchi¹, Takayuki Yanagida¹ (1.NAIST)

Keywords:Scintillator, Floating zone method, Photoluminescence

Scintillator material is one of the luminescent materials which can convert high energy photons such as γ-rays and X-rays to the lower energy photons such as ultraviolet and visible light immediately after the absorption of the ionizing radiation. Usually, scintillators are used in combination with photodetector which is called scintillation detector. Recently, the single crystal type scintillators using the rare earth ions as the luminescence center have been commonly used. Lu₂Si₂O₇ (LPS) has been used for the host materials due to the high effective atomic number, and presents good scintillation performance such as short decay time and highest light yield when it is activated with Pr³⁺ ions compared with the other Orthosilicates host. In this study, photoluminescence and scintillation properties of LPS single crystals doped with Sm and Eu have been investigated for comparative study of different luminescence centers. Samples were fabricated by the floating zone method.