期刊
OPTICAL MATERIALS
卷 90, 期 -, 页码 20-25出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2019.02.008
关键词
Ce:GYGAG ceramics; Photoluminescence; Decay kinetics; Scintillation efficiency
资金
- National key R&D Program of China [2017YFB0310500, 2016YFB0701004]
- National Natural Science Foundation of China [61775226, 61675221]
- Czech Science Foundation [16-15569S]
- ASCR-CAS bilateral mobility project
The cerium doped Gd2YGa3Al2O12 (Ce:GYGAG) scintillation ceramics were fabricated by the solid state reaction method. The microstructure, luminescence and scintillation properties have been studied. In photoluminescence decays, the decay times of Ce:GYGAG ceramic samples are close to monoexponential. Some slower component can be found, which can be related to the local inhomogeneities of ceramic sample and self-absorption of Ce3+. Meanwhile, the Ce:GYGAG ceramics perform excellent on scintillation efficiency which is evaluated by the XEL steady-state luminescence and its fast part characterized by light yield (LY). The LY value reaches similar to 45000 ph/MeV with an energy resolution of 8.67% under the gamma-ray excitation. The LY0.5 mu s/LY6 mu s value of Ce:GYGAG is calculated to be 87.5% which is much superior than 42.5% in compared Ce:LuAG ceramics. In the scintillation decays, a lower content of slow components are detected in Ce:GYGAG ceramic sample comparing to the Ce:LuAG ceramics.
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