Compositional engineering of multicomponent garnet scintillators: towards an ultra-accelerated scintillation response
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 spa...
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| Published in: | Materials advances Vol. 3; no. 17; pp. 6842 - 6852 |
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| Main Authors: | , , , , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
31-08-2022
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| Online Access: | Get full text |
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| Summary: | 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.
A Czochralski-grown single crystal of GAGG:Ce,Mg allows for a high Ce dopant and Mg codopant concentration in the crystal, resulting in acceleration of scintillation decay down to several nanoseconds at the expense of light yield. |
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| Bibliography: | https://doi.org/10.1039/d2ma00626j Electronic supplementary information (ESI) available: Compositional engineering of multicomponent garnet scintillators rev. See DOI |
| ISSN: | 2633-5409 2633-5409 |
| DOI: | 10.1039/d2ma00626j |