Lithium aluminate crystals as scintillator for thermal neutron detection

Yutaka Fujimoto, Kei Kamada, Takayuki Yanagida, Noriaki Kawaguchi, Shunsuke Kurosawa, Daisuke Totsuka, Kentaro Fukuda, Kenichi Watanabe, Atsushi Yamazaki, Yuui Yokota, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Undoped and Cu +-doped lithium aluminate LiAlO 2 singe crystals have been grown using micro-pulling down (μ-PD) technique. After cutting and polishing, optical properties and scintillation characteristics of the crystals were examined. From the transmittance measurements, Cu +-doped crystal showed absorption band around 270 nm, which is corresponding to the transition between Cu + 3d 10 and 3 d 9 4s states. Ultra violet emission peak appeared around 360 nm under 270 nm excitation. The emission decay time was calculated to be about 17.3 μ s. 241 Am 5.5 MeV alpha-ray excited radioluminescence spectra exhibited intense luminescence band at 360 nm due to the Cu +3d 94s-3d 10 transitions. By the pulse height spectra 252 Cf neutron source excitation, the scintillation light output of Cu +-doped LiAlO 2 was found to be about 8700 ph/n.

Original languageEnglish
Article number6218140
Pages (from-to)2252-2255
Number of pages4
JournalIEEE Transactions on Nuclear Science
Volume59
Issue number5 PART 2
DOIs
Publication statusPublished - 2012

Keywords

  • Crystalline materials
  • inorganic compounds
  • luminescence
  • solid scintillation detectors

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering

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