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. Due to the peculiar feature of the GAGG host to tolerate extremely high cerium and magnesium concentrations while still maintaining a bulk single crystal form, this scintillator has a great potential for high-count-rate applications in high energy physics experiments and industries with harsh operational environments, where a lower light yield can be tolerated.

Martinazzoli, L., Nargelas, S., Bohacek, P., Calà, R., Dusek, M., Rohlicek, J., et al. (2022). Compositional engineering of multicomponent garnet scintillators: towards an ultra-accelerated scintillation response. MATERIALS ADVANCES, 3(17), 6842-6852 [10.1039/d2ma00626j].

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

Martinazzoli L.;Calà R.;
2022

Abstract

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. Due to the peculiar feature of the GAGG host to tolerate extremely high cerium and magnesium concentrations while still maintaining a bulk single crystal form, this scintillator has a great potential for high-count-rate applications in high energy physics experiments and industries with harsh operational environments, where a lower light yield can be tolerated.
Articolo in rivista - Articolo scientifico
Scintillation; Luminescence; Garnets
English
12-lug-2022
2022
3
17
6842
6852
none
Martinazzoli, L., Nargelas, S., Bohacek, P., Calà, R., Dusek, M., Rohlicek, J., et al. (2022). Compositional engineering of multicomponent garnet scintillators: towards an ultra-accelerated scintillation response. MATERIALS ADVANCES, 3(17), 6842-6852 [10.1039/d2ma00626j].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/445882
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