Optimization of dopants and scintillation fibers' diameter of GdAlO3/α -Al2O3 Eutectic for high-resolution x-ray imaging

Kei Kamada, Nobuhiro Yasui, Yoshihiro Ohashi, Toru Den, Hiroaki Yamaguchi, Akihiro Yamaji, Yasuhiro Shoji, Masao Yoshisno, Kyoung Jinkim, Shunsuke Kurosawa, Yuji Ohashi, Yuui Yokota, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Submicrometer diameter phase-separated scintillator fibers (PSSFs) were reported and they possessed both the properties of an optical fiber and radiation-to-light conversion. The PSSFs were fabricated using a directionally solidified eutectic system. High-resolution X-ray imaging can be developed using the PSSFs. In this paper, Tb- and Eu-doped GdAlO3 (GAP)/ α-Al2O3 eutectic scintillator was grown by the micro pulling down method with various growth rates in order to achieve the high light output and the high light-guiding efficiency. Relationship between radioluminescence intensity and dopant concentration of Eu and Tb was investigated. At the optimized dopant concentration, relationship between growth rate, eutectic period structure, diameter of PSSFs, and contrast transfer function was investigated to achieve high-resolution X-ray imaging.

Original languageEnglish
Article number8367866
Pages (from-to)2036-2040
Number of pages5
JournalIEEE Transactions on Nuclear Science
Issue number8
Publication statusPublished - 2018 Aug


  • Crystalline materials
  • luminescence
  • scintillation counters

ASJC Scopus subject areas

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

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