| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5442704 | Optical Materials | 2017 | 5 Pages |
Abstract
Monovalent Li+ codoped Lu3Al5O12:Ce (LuAG:Ce) optical ceramics were fabricated by solid state reaction method and further optimized by an air-annealing process. Optical absorption, radioluminescence spectra and scintillation properties such as light yield, scintillation decay times and afterglow were measured and compared with those of the Li+ free LuAG:Ce ceramic and the commercial LuAG:Ce single crystal samples. Positive effect of Li+ codopant consists mainly in the significant increase of scintillation light yield, acceleration of scintillation decay as well as the decrease of afterglow intensity. With 0.3% Li codoping, the obtained LuAG:Ce,Li ceramic displays a light yield of â¼29200 ph/MeV at 10 μs shaping time, higher than that of the LuAG:Ce single crystal and optical ceramic scintillators ever reported. The partial conversion of the stable Ce3+ to Ce4+ centers and the shallow and deep traps effect suppression by the Li+ codoping are discussed.
Keywords
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Shuping Liu, Xiqi Feng, Jiri A. Mares, Vladimir Babin, Chen Hu, Huamin Kou, Carmelo D'Ambrosio, Jiang Li, Yubai Pan, Martin Nikl,