Submicron-diameter phase-separated scintillator fibers for high-resolution X-ray imaging

Yoshihiro Ohashi, Nobuhiro Yasui, Yuui Yokota, Akira Yoshikawa, Toru Den

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)


We demonstrated micrometer-scale resolution X-ray imaging by using phase-separated scintillator fibers. Hexagonally well-aligned 680-nm-diameter GdAlO3(GAP):Ce3+ scintillator fibers surrounded with α-Al2O3 were fabricated from directionally solidified eutectics. The GAP:Ce3+ fibers convert X-rays to lights and emitted lights are confined and transported along the fiber direction by a total reflection mode. High-resolution X-ray image of a gold grating phantom with a 4 μm aperture, corresponding to a bundle of 12 fibers, was achieved even with a 150 -μm-thick scintillator. These scintillator fibers overcome resolution reduction caused by light scattering and almost reach the resolution limit of the material nature itself.

Original languageEnglish
Article number051907
JournalApplied Physics Letters
Issue number5
Publication statusPublished - 2013 Feb 4

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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