Scintillation properties of Ce-doped LiAlO2 for neutron detection

Takebuchi Yuma, Watanabe Kenichi, Nakauchi Daisuke, Fukushima Hiroyuki, Kato Takumi, Kawaguchi Noriaki, Yanagida Takayuki

Research output: Contribution to journalArticlepeer-review

Abstract

Undoped and Ce-doped LiAlO2 single crystals, a novel neutron scintillator, were synthesized by the floating zone method, and the photoluminescence and scintillation properties were investigated. Under X-ray irradiation, all the synthesized crystals showed luminescence due to oxygen vacancies with decay time constants of 250 ns and 2 ¯s, and Ce-doped LiAlO2 crystals showed luminescence due to the 5d4f transition of Ce3+ with a decay time constant of 40 ns as well. In the pulse height spectra under neutron irradiation from 252Cf, the synthesized crystals exhibited thermal neutron peak, and scintillation light yields increased by doping of Ce. Furthermore, neutron and gamma-ray pulse shape discrimination was examined, and 0.5 and 1.0 % Ce-doped ones showed a distinction of neutron and gamma-ray events.

Original languageEnglish
Pages (from-to)397-401
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume129
Issue number7
DOIs
Publication statusPublished - Jul 1 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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