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主要对石榴石系列闪烁晶体近10多年的研究和发展情况进行了梳理。介绍了Pr、Ce掺杂的(Lu,Y)AG晶体中不同发光中心的发光机理、能量的传递、载流子再束缚过程等;阐述了反位缺陷(antisite defect,AD)对发光中心发光性能的影响及其作用机制;用带隙工程理论分析了Gd、Ga掺入可以消除AD缺陷副作用的机理。展示了新型石榴石晶体Gd3(Ga5–xAlx)O12:Ce(GGAG:Ce)晶体的光产额和能量分辨率,预计这类多组分掺杂将把石榴石晶体的发展引入一个新的阶段。
The research and development of garnet series scintillation crystals have been mainly reviewed in recent ten years. The luminescence mechanism, energy transfer and carrier re-binding process of different luminescent centers in Pr, Ce doped (Lu, Y) AG crystals are introduced. The effects of antisite defects (AD) Performance and its mechanism of action. The bandgap engineering theory was used to analyze the mechanism that Gd and Ga incorporation can eliminate the side effects of AD defects. Shows the light yield and energy resolution of a new garnet crystal Gd3 (Ga5-xAlx) O12: Ce (GGAG: Ce) crystal. It is expected that such multi-component doping will lead the development of garnet crystals into a new phase .