Compositional engineering of multicomponent garnet scintillators: towards an ultra-accelerated scintillation response

0560752 - FZÚ 2023 RIV GB eng J - Journal Article
Martinazzoli, L. - Nargelas, S. - Boháček, Pavel - Cala', R. - Dušek, Michal - Rohlíček, Jan - Tamulaitis, G. - Auffray, E. - Nikl, Martin
Compositional engineering of multicomponent garnet scintillators: towards an ultra-accelerated scintillation response.
Materials Advances. Roč. 3, č. 17 (2022), s. 6842-6852. E-ISSN 2633-5409
R&D Projects: GA ČR(CZ) GA21-17731S; GA MŠMT(CZ) EF16_019/0000760
EU Projects: European Commission(XE) 101004761 - AIDAinnova
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : GAGG single-crystal scintillators * cerium activator * photoluminiscence
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 5, year: 2022
Method of publishing: Open access

Optical, luminescence and scintillation characteristics were studied in garnet-type GAGG single-crystal scintillators grown by the Czochralski method and heavily doped with a cerium activator and a magnesium codopant at different concentrations. Emission quenching due to the formation of closely spaced Ce–Mg pairs accelerating the photoluminescence and scintillation decays down to a few nanoseconds and substantial suppression of slower decay components are observed. We show that despite a significant decrease in the scintillation yield, the coincidence time resolution and the afterglow, which are the most critically important parameters of fast scintillators, exhibited by the heavily doped GAGG:-Ce,Mg are superior to those in the state-of-the-art scintillators.
Permanent Link: https://hdl.handle.net/11104/0333654