摘要
(Ce,Gd)_(3)(Ga,Al)_(5)O_(12)(Ce:GGAG)属于石榴石结构立方晶系,密度高(~6.7 g/cm^(3)),有效原子序数大(55),对高能射线吸收能力强,用Bartram-Lempicki模型计算其理论光产额可达73500 pho/MeV,是目前发现的光产额最高的氧化物闪烁材料,且能量分辨率极佳(4.6%@662 keV,FWHM)。此外,研究工作还表明,经高剂量辐射后的Ce:GAGG晶体的抗辐照损伤性能与硅酸盐闪烁材料相比有较大优势,因而受到了国内外的广泛关注和研究,被认为是理想的新一代高性能CT探测器用闪烁材料。综述了近年来国内外Ce:GGAG闪烁体的研究进展,包括粉体、薄膜、陶瓷、晶体的制备,微结构和光学表征,组份调控与性能优化以及器件成像等。
(Ce,Gd)_(3)(Ga,Al)_(5)O_(12) (Ce:GGAG) belongs to garnet cubic crystal system with high density(~6.7 g/cm^(3)),high effective atomic number(55)and strong absorption ability to high-energy rays.The theoretical light yield of(Ce,Gd)_(3)(Ga,Al)_(5)O_(12)(Ce:GGAG) reaches 73500 pho/MeV calculated by Bartram-Lempicki model,which is the highest light yield in oxide scintillate material found so far,with excellent energy resolution(4.6%@662 keV,FWHM).In addition,the research also shows that Ce:GAGG crystals under high dose of radiation show a better radiation hardness compared with silicate scintillation materials.Therefore,they have been widely studied in worldwide,and are considered to be an ideal scintillation material for a new generation of high-performance CT detectors.In this paper,the recent research progress of Ce:GGAG scintillator is reviewed,including the powdersfilms,ceramics and crystals,microstructure and optical characterization,composition engineering for performance optimization,as well as device imagination.
作者
武彤
王玲
许天照
王慧
汪超越
黄新堂
申慧
石云
WU Tong;WANG Ling;Xu Tianzhao;WANG Hui;WANG Chaoyue;HUANG Xintang;SHEN Hui;SHI Yun(State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;College of Physical Science and Technology,Central China Normal University,Wuhan 430079,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Science,Beijing 100049,China;School of Materials Science and Engineering,Shanghai Institute of Technology,Shanghai 201418,China)
出处
《应用技术学报》
2021年第2期109-125,共17页
Journal of Technology
基金
上海市科学技术委员会基金(19DZ1100703,19511107600,18511110400)
国家重点研发计划项目(2016YFB0701004)
中国科学院战略性先导科技专项(XDA22000000)
上海市科委青年科技英才扬帆计划(17YF1421500)资助。
