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

▲ [14p-PA2-35] Optical and scintillation properties of Tm-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 a luminescence material which can convert a high energy photon and particle of the ionizing radiation to the lower energy photons such as ultraviolet and visible light immediately after the absorption of the ionizing radiation. The emitted photons will be collected by photodetectors such as photomultiplier tube (PMT) and converted to the electrical signal for radiation detection purpose. The single crystal type scintillators using the rare earth ions as a luminescence center have been commonly investigated. As such an emission center ion, Tm³⁺ is well known for clear visible light emission in the blue range which is nessecery in the display and other blue phosphors related devices. For the host materials, Lu₂Si₂O₇ (LPS) has been selected in this study due to the high effective atomic number and good scintillation properties when doped with Ce³⁺ ions such as a short decay time and a high light yield.
In this study, we focused on the optical and scintillation properties of Tm-doped LPS (Tm:LPS) single crystal synthesized by the floating zone method.