Luminescence properties and scintillation response in Ce3+-doped Y2Gd1Al5-xGaxO12 (x = 2, 3, 4) single crystals

Warut Chewpraditkul, Dalibor Pánek, Petr Brůža, Weerapong Chewpraditkul, Chalerm Wanarak, Nakarin Pattanaboonmee, Vladimir Babin, Karol Bartosiewicz, Kei Kamada, Akira Yoshikawa, Martin Nikl

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The compositional dependence of luminescence properties and scintillation response were investigated in Ce3+-doped Y2Gd 1Al5-xGaxO12 (x=2, 3, 4) single crystals. The Gd3+ → Ce3+ energy transfer was evidenced by photoluminescence excitation spectra of Ce3+ emission. With increasing Ga content in the garnet host, the Ce3+ luminescence from the lowest 5d level (5d1) is shifted toward higher energy due to the decrease in the crystal field splitting of the 5d levels. Light yield (LY) and its dependence on the amplifier shaping time were measured under excitation with γ-rays. High LY value of ∼38000ph/MeV was obtained for a Y 2Gd1Al3Ga2O12:Ce sample. Scintillation decay was measured with an extended dynamical and temporal scale under the nanosecond pulse soft X-ray excitation. The decrease of both LY value and relative contribution of slower decay component in the scintillation response was observed with increasing Ga content in the garnet host.

Original languageEnglish
Article number083505
JournalJournal of Applied Physics
Issue number8
Publication statusPublished - 2014 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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