Optical and scintillation properties of Sc2O3, Y 2O3 and Lu2O3 transparent ceramics synthesized by SPS method

Yoshisuke Futami, Takayuki Yanagida, Yutaka Fujimoto, Jan Pejchal, Makoto Sugiyama, Shunsuke Kurosawa, Yuui Yokota, Akihiko Ito, Akira Yoshikawa, Takashi Goto

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28 Citations (Scopus)

Abstract

Sc2O3, Y2O3 and Lu 2O3 transparent ceramics were prepared by the spark plasma sintering (SPS) method. After polishing, the samples were semitransparent. Their optical transmittance was 10-40% at 500 nm which corresponded with their semi-transparency. In the X-ray induced emission spectra, a broad emission peak appeared around 335 nm in each sample. For this wavelength, scintillation decay time for Y2O3 and Sc2O3 were 22 and 48 ns, respectively. The light yield of Sc2O3, Y 2O3 and Lu2O3 was 16,200, 2600, and 200 ph/5.5 MeV-alpha, respectively, which followed from the alpha-ray induced pulse height spectra. The gamma-ray induced light yield of Sc2O 3 was 11,500 ph/MeV, which is 1.4 times larger than that of conventional single crystal BGO (Bi4Ge3O12) scintillator. Light yield non-proportionality and energy resolution of Sc 2O3 were examined for the first time.

Original languageEnglish
Pages (from-to)136-140
Number of pages5
JournalRadiation Measurements
Volume55
DOIs
Publication statusPublished - 2013 Aug 1

Keywords

  • Gamma-ray
  • Light yield
  • Scintillation properties
  • Sesquioxide
  • Transparent ceramics

ASJC Scopus subject areas

  • Radiation
  • Instrumentation

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