石榴石闪烁材料的研究进展  

Recent Development on Garnet Single Crystal and Ceramic Scintillators

作　　者：李江[1] 陈肖朴 寇华敏[1] 石云[1] 陈昊鸿[1] 胡泽望 

机构地区：[1]中国科学院上海硅酸盐研究所,透明光功能无机材料重点实验室,上海201899 [2]中国科学院大学,北京100049

出　　处：《硅酸盐学报》2018年第1期116-127,共12页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(61775226,61475175,61675221,U1332202);国家重点研发计划(2016YFB07010000,2017YFB0310502)资助项目

摘　　要：稀土离子掺杂的石榴石闪烁材料是20世纪90年代以后发展出的新型氧化物闪烁体。以Ce^3＋为发光中心的YAG与LuAG晶体是性能优良的闪烁体,具有纳秒级快衰减、高光产额等特性。而Pr^3＋为发光中心的LuAG单晶以其更快的衰减时间,被认为是下一代的TOF-PET探测器用的关键材料之一。在此基础之上,由于YAG与LuAG陶瓷制备温度较低,有利于减少基质中的反位缺陷,从而实现对闪烁性能优化。而近年来,＂缺陷工程＂与＂能带工程＂两种新思想的提出,对石榴石单晶与陶瓷的优化提出新的思路,从而石榴石闪烁材料性能得到进一步提升。本文综合评述了石榴石单晶与陶瓷闪烁体的研究进展,着重介绍＂缺陷工程＂和＂能带工程＂两种思想在石榴石体系闪烁材料优化中的应用,最后对其发展前景进行了展望。Rare-earth element ions doped garnet scintillators are oxide scintillators,which have been developed since 1990 s.Ce^3＋ activated YAG and LuAG single crystals are prospective scintillators due to their fast decay time and high light yield.Pr^3＋ activated LuAG single crystal is considered as one of the effective candidates for next generation TOF-PET detetor due to their extremely fast decay time.YAG and LuAG ceramics can reduce the concentration of anti-site defects that are harmful to scintillation properties due to their low fabrication temperatures.Recent methods called ＂defects engineering＂ and ＂bandgap engineering＂ were described for the further optimization of scintillation properties in garnet scintillators.Development of garnet single crystals and ceramics was represented.In addition,the further work on the garnet single crystal and ceramic scintillators was also proposed.

关 键 词：石榴石单晶 石榴石陶瓷 闪烁体 研究进展 

分 类 号：TQ174.75[化学工程—陶瓷工业]