Luminescence properties of Ce-activated YAG optical ceramic scintillator materials
Luminescence properties of Ce-activated YAG optical ceramic scintillator materials
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DOI：
10.1016/s0022-2313(97)00103-8
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发表时间：
1997-10
影响因子：
3.6
通讯作者：
E. Zych;C. Brecher;A. Wojtowicz;H. Lingertat
中科院分区：
文献类型：
--
作者：
E. Zych;C. Brecher;A. Wojtowicz;H. Lingertat
报道了高密度透明的YAG：Ce陶瓷的闪烁和发光特性，并与单晶进行了比较。当用伽马射线激发时，两种材料都表现出相同的主导≈85 ns的衰变，但陶瓷也显示出单晶中完全不存在的≈20 ns的新的快速分量。由于晶界晶格的变形引起的异常损耗过程，陶瓷的闪烁输出约为单晶的50%。提出了一个考虑能带结构扭曲的唯象模型来解释动力学测量的结果。
Scintillation and luminescence characteristics of a highly dense transparent YAG: Ce-ceramic are reported and compared to those of a single crystal. When excited with gamma-rays both types of materials display the same dominant ≈85 ns decay, but the ceramic also shows a new rapid component of ≈20 ns that is completely absent in the single crystal. The scintillation output from the ceramic reaches about 50% of that from the single crystal, having been diminished by unusual loss processes caused by the deformed lattice at the grain boundary interfaces. A phenomenological model involving distortion of the band structure is proposed to explain the results of kinetic measurements.