[20p-224B-1~8] 2.1 放射線物理一般・検出器基礎

▲ [20p-224B-6] Scintillation properties of LYSO single crystals activated with Cerium and Molybdenum

〇KYOUNGJIN KIM¹、KEI KAMADA^2,3、MASAO YOSHINO¹、GUSHCHINA LUIDMILA³、VLADIMIR V. KOCHURIKHIN³、YASUHIRO SHOJI³、AKIHIRO YAMAJI¹、SHUNSUKE KUROSAWA^2,4、YUUI YOKOTA²、YUJI OHASHI²、AKIRA YOSHIKAWA¹ (1.IMR, Tohoku Univ.、2.NICHe, Tohoku Univ.、3.C&A Corp.、4.Yamagata Univ.)

キーワード：Scintillator, Single crystal growth, Co-doping

In this study, we investigated Mo co-doping effects on luminescence and scintillation properties of Ce:LYSO single crystal scintillators. The Mo co-doped Ce:LYSO single crystals were prepared by micro-pulling down(m-PD) method with a wide concentration range of the co-dopants. Absorption, radioluminescence, PLE and PL spectra were measured together with several other scintillation characteristics, namely the scintillation decay and light yield to reveal the effect of Mo co-doping. Comparing to Ce³⁺ only doped LYSO, Mo 1000 ppm co-doped crystal has almost 1.5 times higher light yield and shows slightly accelerated scintillation decays. Details of changes in scintillation properties with Mo co-doping will be discussed.