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<p>&#xa0; This study aims to compare the scintillation properties of different GAGG:Ce samples and to identify effective approaches for shortening the decay time for high-rate applications. &#xa0; Four GAGG:Ce samples, including single crystal and ceramic scintillators, were studied. The main scintillation properties, including light yield, emission kinetics, thermoluminescence, and afterglow, were measured. The experimental results were analyzed together with literature data to evaluate possible strategies for decay-time reduction. &#xa0; The light yield of the studied samples ranged from 23,000 to 56,000 ph/MeV, while their decay times differed significantly. Notably, one single-crystal sample exhibited a remarkably fast dominant component of 96.4 ns (72.4% contribution), alongside a very fast 24.3 ns component. We identified an inverse correlation between scintillation emission kinetics and light yield, with the fastest sample showing intensified thermoluminescence, suggesting enhanced defect-mediated quenching. Based on our results and literature analysis, we evaluated three strategic approaches for reducing the decay time: compositional tuning (Ga/Al ratio), Ce concentration optimization, and Mg2+ co-doping. The ceramic sample demonstrated reduced thermoluminescence, offering a promising alternative for large-volume applications. &#xa0; The results clarify the relationship between light yield, emission kinetics, and defect-related processes in GAGG:Ce and provide practical guidance for the development of faster scintillators for high-energy physics and medical imaging.</p>

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Comparative study of GAGG:Ce scintillators: strategies for decay time reduction

  • 期刊论文

  • 发表日期：

    2026年5月8日

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  • Andrei Sidorenkov,
  • Anastasiia Budzinskaya,
  • Lingyue Chen,
  • Almaz Fazliakhmetov,
  • Dmitrii Gursky,
  • Jifeng Han,
  • Hao He,
  • Peng Hu,
  • Zhehao Hua,
  • Xingcan Li,
  • Bayarto Lubsandorzhiev,
  • Sultim Lubsandorzhiev,
  • Arslan Lukanov,
  • Dmitrii Nanzanov,
  • Sen Qian,
  • Ruiqiang Song,
  • Nikita Ushakov,
  • Dmitrii Voronin,
  • Zhigang Wang,
  • Yao Zhu

摘要

  This study aims to compare the scintillation properties of different GAGG:Ce samples and to identify effective approaches for shortening the decay time for high-rate applications.   Four GAGG:Ce samples, including single crystal and ceramic scintillators, were studied. The main scintillation properties, including light yield, emission kinetics, thermoluminescence, and afterglow, were measured. The experimental results were analyzed together with literature data to evaluate possible strategies for decay-time reduction.   The light yield of the studied samples ranged from 23,000 to 56,000 ph/MeV, while their decay times differed significantly. Notably, one single-crystal sample exhibited a remarkably fast dominant component of 96.4 ns (72.4% contribution), alongside a very fast 24.3 ns component. We identified an inverse correlation between scintillation emission kinetics and light yield, with the fastest sample showing intensified thermoluminescence, suggesting enhanced defect-mediated quenching. Based on our results and literature analysis, we evaluated three strategic approaches for reducing the decay time: compositional tuning (Ga/Al ratio), Ce concentration optimization, and Mg2+ co-doping. The ceramic sample demonstrated reduced thermoluminescence, offering a promising alternative for large-volume applications.   The results clarify the relationship between light yield, emission kinetics, and defect-related processes in GAGG:Ce and provide practical guidance for the development of faster scintillators for high-energy physics and medical imaging.