Scintillation properties of Gd3Al2Ga3O12:Ce, Li and Gd3Al2Ga3O12:Ce, Mg single crystal scintillators: A comparative study

Warut Chewpraditkul, Nakarin Pattanaboonmee, Ongsa Sakthong, Kriangkrai Wantong, Weerapong Chewpraditkul, Akira Yoshikawa, Kei Kamada, Shunsuke Kurosawa, Tomasz Szczesniak, Marek Moszynski, Vladimir Babin, Martin Nikl

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The scintillation characteristics of Gd3Al2Ga3O12:Ce, Li (GAGG:Ce,Li) and Gd3Al2Ga3O12:Ce, Mg (GAGG:Ce,Mg) single crystals were compared. Radioluminescence spectra and photoluminescence decay curves were measured at various temperatures between 77 and 500 K to investigate the thermal luminescence quenching. At 662 keV γ rays, the LY value of 35,400 photons/MeV and energy resolution of 6.9% obtained for GAGG:Ce, Li are superior to those of 24,200 photons/MeV and 9.5% for GAGG:Ce,Mg. Scintillation decays are approximated by a double exponentials with a fast principal decay component of 47 ns (83%) for GAGG:Ce, Mg and 90 ns (86%) for GAGG:Ce,Li. Coincidence time resolution of 282 ps obtained for GAGG:Ce, Mg is better than that of 389 ps for GAGG:Ce,Li. GAGG:Ce, Mg shows a much lower afterglow and thermally stimulated luminescence intensity with respect to GAGG:Ce,Li.

Original languageEnglish
Pages (from-to)181-186
Number of pages6
JournalOptical Materials
Volume92
DOIs
Publication statusPublished - 2019 Jun

Keywords

  • Light yield
  • Luminescence
  • Multicomponent garnets
  • Scintillators
  • Time resolution

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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    Chewpraditkul, W., Pattanaboonmee, N., Sakthong, O., Wantong, K., Chewpraditkul, W., Yoshikawa, A., Kamada, K., Kurosawa, S., Szczesniak, T., Moszynski, M., Babin, V., & Nikl, M. (2019). Scintillation properties of Gd3Al2Ga3O12:Ce, Li and Gd3Al2Ga3O12:Ce, Mg single crystal scintillators: A comparative study. Optical Materials, 92, 181-186. https://doi.org/10.1016/j.optmat.2019.04.023