Time-resolved photoluminescence analysis of ceramic Ce:GAGG scintillators

Authors:
  • AMAlima Melis
    Alima Melis
  • JYJung-Yeol Yeom
    Jung-Yeol Yeom
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Abstract
This paper introduces the characteristics and efficiency of post-treatment methods for enhancing the timing resolution of ceramic Ce:GAGG scintillators. The thermal annealing and surface treatments were included to analyze their impact on time-resolved photoluminescence (TRPL) and thermoluminescence (TL) characteristics. Optical properties were improved by suppressing nonradiative recombination due to the reduced surface defects, while heat-treatment removes traps as confirmed by TL measurements. TRPL decay characteristics revealed that samples treated with mechanical polishing followed by heat treatment exhibited the best scintillation performance, with a slow component of 272.3 ns. These findings will aid in developing techniques for improving the luminescence of other inorganic scintillators.
Funding Information
  • National Research Foundation of Korea (NRF-2020R1C1C1007296, RS-2023-00240040, NRF-2022R1I1A1A01065484, NRF-2023R1A2C2007545, RS-2022-00165164, RS-2023-00234651)

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