Basic study of Eu2+-doped garnet ceramic scintillator produced by spark plasma sintering

Makoto Sugiyama, Takayuki Yanagida, Yutaka Fujimoto, Yuui Yokota, Akihiko Ito, Martin Nikl, Takashi Goto, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We report a new discovery of Eu2+-doped bulk garnet ceramic scintillators based on reduction of Eu3+ ions without additives. Eu2+-doped Y3Al5O12 and Lu 3Al5O12 ceramics were prepared by spark plasma sintering (SPS) method. Using SPS, the green and blue luminescence was observed under UV lamp excitation for Eu2+-doped Y3Al 5O12 and Lu3Al5O12 ceramics, respectively. Under excitation by 241Am alpha-ray the Eu2+ 5d-4f emission was observed in radioluminescence spectra both samples. For the first time, scintillation response due to Eu2+ 5d-4f luminescence was observed in the bulk garnet oxide materials. In addition, Eu-doped Al2O3 prepared by SPS showed Eu2+ 5d-4f emission in the radioluminescence spectrum. It is confirmed that Al is a key element to reduce Eu3+ as well as highly reductive condition in SPS.

Original languageEnglish
Pages (from-to)222-226
Number of pages5
JournalOptical Materials
Volume35
Issue number2
DOIs
Publication statusPublished - 2012 Dec

Keywords

  • Scintillator
  • Spark plasma sintering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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