The Ga-admixed GSAG:Ce single crystal scintillator: Composition tuning

0574629 - FZÚ 2024 RIV NL eng J - Journal Article
Zapadlík, Ondřej - Pejchal, Jan - Levchenko, Fedor - Kučerková, Romana - Beitlerová, Alena - Vaněček, Vojtěch - Jurek, Karel - Nikl, Martin
The Ga-admixed GSAG:Ce single crystal scintillator: Composition tuning.
Journal of Luminescence. Roč. 263, Nov (2023), č. článku 119984. ISSN 0022-2313. E-ISSN 1872-7883
R&D Projects: GA ČR(CZ) GA21-17731S
Institutional support: RVO:68378271
Keywords : Scandium garnet compounds * single crystal scintillators * Mg²⁺co-doping * band-gap engineering * multicomponent garnet scintillators
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.6, year: 2022
Method of publishing: Limited access
https://doi.org/10.1016/j.jlumin.2023.119984

The scintillation, luminescence and optical properties of the multicomponent Gd3Sc2Ga(2+x)Al(1-x)O12:Ce (x = 0, 0.25, 0.5, 0.75, 1), Gd2.957Sc1.905Ga(2.138+x)Al(1-x)O12:Ce (x = 0, 1) and the (200, 1000, 5000 ppm) Mg2+ codoped Gd3Sc2Ga2.75Al0.25O12:Ce single crystals grown by the μ-PD method were characterized. Scintillation decay kinetics and light yield were correlated with the sum of the content of Ga and Sc in the host. While the Gaadmixed GSAG:Ce composition exhibited higher scintillation efficiency compared to pure GSAG:Ce, it also showed very high afterglow, due to an intense delayed electron-hole recombination at Ce3+ centres. This was supported by the calculated activation energy obtained from the temperature dependence of photoluminescence decay times. Codoping with Mg2+ significantly improved afterglow compared to pure GSAG:Ce, however, at the expense of light yield
Permanent Link: https://hdl.handle.net/11104/0346924