Optical and scintillation properties of Ca 3NbGa 3Si 2O 14 single crystal grown by micro-pulling down method

Yoshisuke Futami, Yuui Yokota, Masato Sato, Takayuki Yanagida, Noriaki Kawaguchi, Yutaka Fujimoto, Kazushige Tota, Ko Onodera, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The Ca 3NbGa 3Si 2O 14 (CNGS) crystal was grown by the micro-pulling down (μPD) method and the annealing effect on physical properties of CNGS crystal was investigated in this study. And the effects of oxygen content on the physical properties were systematically studied. Additionally, Photoluminescence (PL)-Mapping and radioluminescence spectra of CNGS were observed. The absorption peaks were observed around 350 and 500 nm. This absorption at 500 nm was very sensitive to a quantity of excess oxygen in the CNGS crystal. In contrast, it is expected that the absorption of 350 nm is related to a cation or anion defect. PL-Mapping indicated the emission around 400 nm by excitation at 270 and 350 nm wavelengths. The emission at 400 nm is considered to originate from trapped electron at an anion or cation defect. The emission of the Alpha-ray excited spectra was very similar in comparison with PL-Mapping.

Original languageEnglish
Pages (from-to)129-132
Number of pages4
JournalJournal of Crystal Growth
Issue number1
Publication statusPublished - 2012 Aug 1


  • A1. Alpha-ray response
  • A1. Annealing effect
  • B1. Langasite
  • B2. Optical property
  • B2. Scintillation property

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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