Positive hysteresis of Ce-doped GAGG scintillator

Takayuki Yanagida, Yutaka Fujimoto, Masanori Koshimizu, Kenichi Watanabe, Hiroki Sato, Hideki Yagi, Takagimi Yanagitani

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Positive hysteresis and radiation tolerance to high-dose radiation exposure were investigated for Ce 1% and 3% doped Gd3(Al, Ga) 5O12 (Ce:GAGG) crystal scintillator on comparison with other garnet scintillators such Ce:YAG, Ce:LuAG, Pr:LuAG, and ceramic Ce:GAGG. When they were irradiated by several Gy 60Co γ-rays, Ce 1% doped GAGG crystal exhibited ∼20% light yield enhancement (positive hysteresis). This is the first time to observe positive hysteresis in Ce doped GAGG. On the other hand, other garnet materials did not show the positive hysteresis and their light yields were stable after 800 Gy irradiation except Pr:LuAG. The light yield of Pr:LuAG decreased largely. When irradiated Ce:GAGG which showed positive hysteresis was evaluated in Synchrotron facility (UVSOR), new excitation band was created around 60 nm.

Original languageEnglish
Pages (from-to)2016-2019
Number of pages4
JournalOptical Materials
Volume36
Issue number12
DOIs
Publication statusPublished - 2014 Oct

Keywords

  • Ceramic
  • Scintillation detector
  • Scintillator
  • Single crystal

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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