Evaluation of GAGG: Ce scintillators for future space applications

M. Yoneyama, Jun Kataoka, M. Arimoto, T. Masuda, M. Yoshino, K. Kamada, A. Yoshikawa, H. Sato, Y. Usuki

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Cerium-doped Gd3(Ga, Al)5O12 (GAGG:Ce) is a promising novel scintillator for gamma-ray detectors. While GAGG:Ce has already been implemented in various commercial products, its detailed characteristics and response to high-energy particles and gamma rays remain unknown. In particular, knowledge is lacking on the radiation tolerance of this scintillator against the gamma-ray and proton irradiation expected in future space satellite mission applications. In this study, we first investigate the light-yield energy dependence, energy resolution, decay time, radiation tolerance, and afterglow of GAGG:Ce scintillators under various temperature conditions. We find excellent linearity of ±3% between light yields and deposited energy over a wide range of 30-1836 keV; however, a light-yield deficit of more than 10% is observed below 30 keV of deposited gamma ray energy. We confirm that the temperature dependence of the light yield, energy resolution, and scintillation decay time is within 5-20% between -20 and 20C. We also evaluate the GAGG:Ce activation characteristics under proton irradiation and the light-yield degradation by accumulated dose using a 60Co source. Moreover, we successfully identify various gamma-ray lines due to activation. Finally, we find a substantial afterglow for GAGG:Ce scintillators over a few hours; such an afterglow is only minimally observed in other scintillators such as CsI:Tl and Bi4Ge3O12 (BGO). However, the afterglow can be substantially reduced through additional co-doping with divalent metal ions, such as Mg ions. These results suggest that GAGG:Ce is a promising scintillator with potential application in space satellite missions in the near future.

    Original languageEnglish
    Article numberP02023
    JournalJournal of Instrumentation
    Volume13
    Issue number2
    DOIs
    Publication statusPublished - 2018 Feb 21

    Fingerprint

    Scintillator
    Space applications
    Phosphors
    scintillation counters
    Gamma Rays
    Gamma rays
    afterglows
    gamma rays
    evaluation
    Evaluation
    Proton irradiation
    Energy
    proton irradiation
    radiation tolerance
    Irradiation
    Tolerance
    Activation
    Chemical activation
    Radiation
    energy

    Keywords

    • Gamma detectors (scintillators, CZT, HPG, HgI etc)
    • Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators)
    • X-ray detectors

    ASJC Scopus subject areas

    • Instrumentation
    • Mathematical Physics

    Cite this

    Yoneyama, M., Kataoka, J., Arimoto, M., Masuda, T., Yoshino, M., Kamada, K., ... Usuki, Y. (2018). Evaluation of GAGG: Ce scintillators for future space applications. Journal of Instrumentation, 13(2), [P02023]. https://doi.org/10.1088/1748-0221/13/02/P02023

    Evaluation of GAGG : Ce scintillators for future space applications. / Yoneyama, M.; Kataoka, Jun; Arimoto, M.; Masuda, T.; Yoshino, M.; Kamada, K.; Yoshikawa, A.; Sato, H.; Usuki, Y.

    In: Journal of Instrumentation, Vol. 13, No. 2, P02023, 21.02.2018.

    Research output: Contribution to journalArticle

    Yoneyama, M, Kataoka, J, Arimoto, M, Masuda, T, Yoshino, M, Kamada, K, Yoshikawa, A, Sato, H & Usuki, Y 2018, 'Evaluation of GAGG: Ce scintillators for future space applications' Journal of Instrumentation, vol. 13, no. 2, P02023. https://doi.org/10.1088/1748-0221/13/02/P02023
    Yoneyama, M. ; Kataoka, Jun ; Arimoto, M. ; Masuda, T. ; Yoshino, M. ; Kamada, K. ; Yoshikawa, A. ; Sato, H. ; Usuki, Y. / Evaluation of GAGG : Ce scintillators for future space applications. In: Journal of Instrumentation. 2018 ; Vol. 13, No. 2.
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    AU - Yoshino, M.

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