[11p-S622-1~10] 2.1 Radiation physics and Detector fundamentals

▲ [11p-S622-2] Growth and scintillation properties of Ce and Mo co-doped RE₃Al₅O₁₂ (RE = Y, Lu) single crystal scintillators

〇KYOUNGJIN KIM¹, Kei Kamada^2,3, Masao Yoshino¹, Yasuhiro Shoji^3,1, Vladimir V. Kochurikhin³, Akihiro Yamaji¹, Shunsuke Kurosawa^2,4, Yuui Yokota², Yuji Ohashi², Akira Yoshikawa^1,2,3 (1.IMR, Tohoku Univ., 2.NICHe, Tohoku Univ., 3.C&A Corp., 4.Yamagata Univ.)

Keywords:Scintillator, Co-doping, Garnet

The Mo ion co-doped Ce:YAG and Ce:LuAG single crystals were prepared by micro-pulling (m-PD) down method. Absorption and luminescence spectra were measured together with several other scintillation characteristics, namely the scintillation decay and light yield to reveal the effect of the co-doping. In YAG host, the intensity of anti-site defects (Y(Al) or Al(Y)) related emission at 310 nm was decreased by Mo co-doping. The scintillation decays were accelerated, and light yields were increased about 120% by Mo 1000 ppm co-doping. It is guessed that the suppression of shallow electron traps, generated by the anti-site defects, affected this improvement of scintillation properties.