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

研究成果: Contribution to journalArticle査読

10 被引用数 (Scopus)


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.

ジャーナルIEEE Transactions on Nuclear Science
5 PART 2
出版ステータス出版済み - 2012

All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学
  • 電子工学および電気工学


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