Directionally solidified Eu doped CaF2/Li3AlF6 eutectic scintillator for neutron detection

Kei Kamada, Kousuke Hishinuma, Shunsuke Kurosawa, Yasuhiro Shoji, Jan Pejchal, Yuji Ohashi, Yuui Yokota, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Eu doped CaF2/Li3AlF6 eutectics were grown by μ-PD method. The directionally solidified eutectic with well-aligned 600 nm diameter Eu:CaF2 scintillator fibers surrounded with Li3AlF6 was prepared. The grown eutectics showed an emission peak at 422 nm ascribed to Eu2+ 4f-5d transition from Eu:CaF2 scintillation fiber. Li concentration in the Eu:CaF2-Li3AlF6 eutectic is around 0.038 mol/cm3,which is two times higher than that of LiCaAlF6 single crystal (0.016 mol/cm3). The light yield of Eu:CaF2-Li3AlF6 eutectic was around 7000 ph/neutron. The decay time was about 550 ns (89%) and 1450 ns (11%).

Original languageEnglish
Pages (from-to)71-75
Number of pages5
JournalOptical Materials
Publication statusPublished - 2015 Dec


  • Eutectic
  • Micro-pulling down
  • Scintillator

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering


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