Defect engineering in Mg2+ co-doped LuAG:Ce ceramics: towards ultrahigh fast scintillation proportion

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00640507" target="_blank" >RIV/68378271:_____/25:00640507 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0372124" target="_blank" >https://hdl.handle.net/11104/0372124</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.26599/JAC.2025.9221148" target="_blank" >10.26599/JAC.2025.9221148</a>

Result language
angličtina
Original language name
Defect engineering in Mg2+ co-doped LuAG:Ce ceramics: towards ultrahigh fast scintillation proportion
Original language description
A slow scintillation component due to charge carrier capture at point defects is a serious issue in scintillator materials. Therefore, the fabrication of scintillators with a high proportion of fast components in the scintillation response is of great interest to material scientists. By applying the defect engineering strategy in advanced optical Lu3Al5O12:Ce,Mg (LuAG:Ce,Mg) ceramics, an ultrahigh fast scintillation proportion can be achieved with a slight loss of fast scintillation light. Moreover, low-temperature thermoluminescence (TSL) investigations revealed that the intensities of all the TSL peaks decreased in the Mg2+-codoped samples. The slight loss of fast scintillation light observed was explained by density functional theory (DFT) calculations. The effect of {Ce3+–Mg2−} pairs on emission quenching was compared with that of {Ce3+–Ca2−} pairs. As a consequence, the 0.3 at% Mg2+-codoped ceramic sample has an LY0.5µs/LY10µs ratio of 99.8%, which is better than those reported for isostructural ceramics and single crystals. We conclude with a discussion of the role of Mg2+ co-doping and future research directions concerning other oxide scintillators.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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