Photoluminescence and radioluminescence properties of (Gd8Ca2)(SiO4)6O2 crystals with different concentrations of Ce

作     者：Takuya Igashira Masaki Mori Go Okada Noriaki Kawaguchi Takayuki Yanagida 

作者机构：Graduate School of Materials Science Nara Institute of Sdence and Technology (NAIST) 8916-5 Takayama Ikoma Nam Japan 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2017年第35卷第11期

页      面：1071-1076页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0708[理学-地球物理学] 0703[理学-化学] 0803[工学-光学工程] 

基　　金：Project supported by a Grant-in-Aid for Scientific Research(A) 26249147 from the Ministry of Education,Culture,Sports,Science and Technology of Japan(MEXT) JST A-step,Cooperative Research Project of Research Institute of Electronics,Shizuoka University Inamori Foundation KRF Foundation 

主　　题：Scintillator Apatite Ce^(3+) 5d-4f transition 

摘      要：(GdCa)(SiO)Oapatite crystals doped with different concentrations of Ce were synthesized by the Floating Zone(FZ) method, and we have evaluated the photoluminescence(PL) and radio luminescence(RL) properties. In PL, an emission band appeared around 400 nm under excitation at 300 nm due to the5 d-4 f transitions of Ce3+. The PL decay curves were approximated by a second-order exponential decay function, and the derived decay time constants ranged around 20-25 ns and 40-480 ns. Similar emission was observed in RL, but the decay time constants were much longer than those in PL. The RL afterglow was the lowest in the 1.0% Ce-doped sample. The 1.0% and 2.0% Ce-doped samples showed a full-energy peak in the pulse height spectrum measured underAm 5.5 MeV α-ray irradiation, and the absolute scintillation light yields were estimated to be around 55 and 36 ph/5.5 MeV-a, respectively.