期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 38, 期 9, 页码 3246-3254出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2018.03.023
关键词
Ce,Mg:LuAG ceramics; Ce concentration; Optical and scintillation properties
资金
- National Natural Science Foundation of China [61775226, 61675221, 61475175]
- National key R&D Program of China [2017YFB0310500, 2016YFB0701004]
- Czech Science Foundation project [16-15569S]
- EC H project ASCIMAT [690599]
- ASCR-CAS bilateral mobility project
Ce,Mg:LuAG scintillation ceramics with Ce dopant content ranging from 0.025 at.% to 0.3 at.% and constant 0.2 at.% Mg codoping were fabricated by solid-state reaction. The effects of Ce concentration and annealing conditions on the microstructure, optical quality and scintillation properties are studied in great details. Lattice parameters as well as the absorption, photoluminescence, radioluminescence and thermoluminescence characteristics are investigated as a function of Ce content. Both the photoluminescence and scintillation decays are measured as well in order to study re-absorption and concentration quenching processes. In addition, an enhanced positive effect of air annealing on radioluminescence intensity and light yield is put in evidence. Moreover, the role of the charge transfer absorption of Ce4+ is investigated. Thermoluminescence measurements are performed to investigate the influence of both air annealing and Ce concentration on defects acting as traps. Finally, the correlations among steady state scintillation efficiency, light yield, thermoluminescence and Ce3+ concentration are found and discussed.
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