Photoluminescence and scintillation of LGS (La3Ga 5SiO14), LNGA (La3Nb0.5Ga 5.3Al0.2O14) and LTGA (La3Ta 0.5Ga5.3Al0.2O14) single crystals

Yoshisuke Futami, Takayuki Yanagida, Yutaka Fujimoto, Vitezslav Jary, Jan Pejchal, Yuui Yokota, Masae Kikuchi, Martin Nikl, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

To examine scintillation response of piezoelectric crystals the 241Am 5.5 MeV α-ray excited emission spectra of langasite family crystals, LGS (La3Ga5SiO14), LNGA (La3Nb0.5Ga5.3Al0.2O14) and LTGA (La3Ta0.5Ga5.3Al0.2O 14) were measured. Dominating emission bands were observed at 378 nm for LGS, 556 nm for LNGA and 425 nm for LTGA. X-ray excited radioluminescence intensity of these crystals was quantitatively compared with BGO standard scintillator. Photoluminescence 2D-spectra were measured as well and compared with radioluminescence ones. In LTGA also photoluminescence decays were measured for two dominant contributing emission centers. Observed emission bands within 300-360 nm and beyond 400 nm most probably belong to self-trapped or trapped excitons and lattice defects, respectively.

Original languageEnglish
Pages (from-to)1513-1516
Number of pages4
JournalOptical Materials
Volume34
Issue number9
DOIs
Publication statusPublished - 2012 Jul

Keywords

  • Alpha-ray
  • Photoluminescence
  • Scintillation

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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