GSAG:Ce scintillator: material optimization and intrinsic bottlenecks

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00636120" target="_blank" >RIV/68378271:_____/25:00636120 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22310/25:43933683
Result on the web
<a href="https://hdl.handle.net/11104/0367123" target="_blank" >https://hdl.handle.net/11104/0367123</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d5ma00095e" target="_blank" >10.1039/d5ma00095e</a>

Result language
angličtina
Original language name
GSAG:Ce scintillator: material optimization and intrinsic bottlenecks
Original language description
Several Sc-admixed garnet single crystals of the general composition (Gd,Sc)3(Sc,Al)5O12:Ce and the well-established Gd3Ga2.7Al2.3O12:Ce (GGAG:Ce) one were grown using the micropulling down method. Their optical, luminescence and scintillation characteristics were measured and mutually compared to further optimize the former compositions and reveal the reason for their lower scintillation performance with respect to GGAG:Ce. Correlated experiments of time-resolved luminescence and scintillation spectroscopies further completed by thermoluminescence glow curve measurement and electron paramagnetic resonance (performed on Gd-free Sc-admixed garnets) indicate that Sc3+ is situated at the dodecahedral site of the garnet lattice as a dominant electron trap, creating a bottleneck in the scintillation mechanism of Sc-admixed garnets. This is mainly responsible for the degradation of scintillation efficiency in comparison with GGAG:Ce despite nearly the same effects of Sc and Ga in lowering the conduction band edge in these multicomponent garnets. Calculations of the electronic band structure confirm that the 3d energy levels of Sc3+ at the dodecahedral site are situated in the forbidden gap in Sc-admixed garnets.
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
Result was created during the realization of more than one project. More information in the Projects tab.
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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