Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 42, Issue 13, Pages 6075-6084Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2022.06.023
Keywords
Ce,Ca:LuAG ceramics; Microstructure; Scintillation performance; Luminescence decay
Categories
Funding
- National Natural Science Foundation of China [61 775 226]
- National Key Research and Development Program of China [2021YFE0104800]
- Key Research Project of the Frontier Science of the Chinese Academy of Sciences [QYZDB-SSW-JSC022]
- Operational Programme Research, Development and Education - European Structural and Investment Funds
- Czech Ministry of Education, Youth and Sports [SOLID21 CZ.02.1.01/0.0/0.0/16_019/760]
- Czech Science Foundation [21-17 731S]
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Ce,Ca:LuAG scintillation ceramics with different Ca2+ co-doping concentrations were prepared, and the influence of Ca2+ concentration on optical quality was systematically studied. The results showed that good optical transmittance and high fast scintillation component can be obtained within a certain range of Ca2+ concentrations.
Ce,Ca:LuAG scintillation ceramics with different Ca2+ co-doping concentrations were prepared by the solid-state reaction method. The concentration of Ce3+ was fixed at 0.3 at% and the concentration of Ca2+ ranged from 0 to 1.2 at%. We systematically studied how the Ca2+ concentration affects the optical quality of Ce,Ca:LuAG ceramics by influencing the microstructure in the vacuum sintering and HIP post-treatment. Good optical transmittance could be obtained with Ca2+ concentrations between 0.05 and 0.8 at%, which reached 76.0-81.9 % at 520 nm. The PL and scintillation decay times decrease with increasing Ca2+ concentration up to 0.6 at% with no clear trend above this value. The light yield (LY) values at different shaping times decrease with increasing Ca2+ concentration but the fast scintillation component (LY0.5 (mu s)/ LY3.0 mu s) increases significantly from 79 % to 97 %. The co-doping of Ca2+ also reduces the afterglow level by more than one order of magnitude.
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