Scintillation properties of transparent Lu3Al5O12 (LuAG) ceramics doped with different concentrations of Pr3+

Takayuki Yanagida, Akihiro Fukabori, Yutaka Fujimoto, Akio Ikesue, Kei Kamada, Jun Kataoka, Yuui Yokota, Akira Yoshikawa, Valery Chani

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Transparent ceramics of Pr-doped (0.2 mol%, 0.6 mol%, 1 mol%, and 2 mol%) Lu3Al5O12 (LuAG) scintillators produced by the sintering method are discussed. These materials were cut to the specimens with physical dimensions of 5 × 5 × 2 mm3. Similar size specimens were also prepared from Czochralski grown Pr:LuAG single crystals to compare scintillation properties. Their transmittance and radio luminescence spectra were evaluated. All specimens were highly transparent in wavelength range above 300 nm, and intense Pr3+ 5d-4f emission was detected around 310 and 370 nm under excitation with X-ray. Under 137Cs γ-ray is irradiation, 2 keV photo-absorption peaks were also clearly observed in each sample. The Pr 0.6 mol% doped LuAG ceramics demonstrated highest light yield achievable among the ceramics, and it was half of that observed in the single crystals. Under pulse X-ray excitation, the decay time constants became faster when Pr concentration increased, and. the fastest decay (∼5.7 ns time constant) was noticed in the 2 mol% doped ceramic. (

Original languageEnglish
Pages (from-to)140-143
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume8
Issue number1
DOIs
Publication statusPublished - 2011 Jan 1

Keywords

  • Gamma-ray
  • LuAG
  • Pr
  • Scintillator
  • Transparent ceramic

ASJC Scopus subject areas

  • Condensed Matter Physics

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