Eu and Rb co-doped LiCaAlF6 scintillators for neutron detection

Akihiro Yamaji, Takayuki Yanagida, Noriaki Kawaguchi, Yuui Yokota, Yutaka Fujimoto, Shunsuke Kurosawa, Jan Pejchal, Kenichi Watanabe, Atsushi Yamazaki, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Eu and Rb co-doped LiCaAlF6 (LiCAF) single crystals with different dopant concentrations were grown by the micro-pulling-down method for neutron detection. Their transmittance spectra showed strong absorption bands at 200-220 and 290-350 nm, and under 241Am alpha-ray excitation, their radioluminescence spectra exhibited an intense emission peak at 373 nm that was attributed to the Eu2+ 5d-4f transition. These results were consistent with those for the Rb-free Eu:LiCAF. The highest light yield among the grown crystals was 36,000 ph/n, which was 20% greater than that of the Rb-free crystal. In addition, the neutron-excited scintillation decay times were 650-750 ns slower than that of the Rb-free Eu:LiCAF.

Original languageEnglish
Pages (from-to)132-135
Number of pages4
JournalRadiation Measurements
Volume55
DOIs
Publication statusPublished - 2013 Aug 1

Keywords

  • Co-doping
  • LiCaAlF
  • Scintillator
  • Single crystal
  • Thermal neutron

ASJC Scopus subject areas

  • Radiation
  • Instrumentation

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