期刊
JOURNAL OF LUMINESCENCE
卷 216, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2019.116728
关键词
Ca-2(+) co-doping; Scintillation ceramic; Fast component
类别
资金
- National Key Research & Development Program of China [2017YFB0310503]
- National Nature Science Funds of China [U1830125, 11535010]
- Youth Innovation Promotion Association of CAS
- China Postdoctoral Science Foundation [2016M601654]
A Ca2+ ions codoped LuAG:Ce scintillation ceramic was fabricated and oxygen annealing treatment was then applied to eliminate the oxygen vacancies. The Ca2+ codoped ceramic exhibits a faster decay time (42 ns) than the uncodoped one. And the light yield at 1 mu s is about 24,100 ph/MeV and reaches to 28,200 ph/MeV when using a shaping time of 12 mu s. The slow scintillation component is also suppressed. The fast-to-slow ratio calculated as LY(1 mu s)/LY(12 mu s) is approximately 85.5%. With Ca2+ ions codopant, the intensity of thermally stimulated luminescence was greatly reduced and Ce3+ ions was partially oxidized to Ce4+ ions. The significant improvement of the scintillation performance indicate that the Ca2+ ions codopoing is a good method to modify the performance of LuAG:Ce ceramic scintillator.
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