Optimization of Dopants and Scintillation Fibers’ Diameter of GdAlO3/[Formula Omitted]-Al2O3 Eutectic for High-Resolution X-Ray Imaging

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 us...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2018-01, Vol.65 (8), p.2036
Main Authors: Kamada, Kei, Yasui, Nobuhiro, Ohashi, Yoshihiro, Den, Toru, Yamaguchi, Hiroaki, Yamaji, Akihiro, Shoji, Yasuhiro, Yoshisno, Masao, JinKim, Kyoung, Kurosawa, Shunsuke, Ohashi, Yuji, Yokota, Yuui, Yoshikawa, Akira
Format: Article
Language:English
Subjects:
Aluminates
Aluminum oxide
Directional solidification
Dopants
Eutectics
Fibers
Gadolinium compounds
Growth rate
High resolution
Image resolution
Luminous intensity
Optical fibers
Optical properties
Optimization
Radiation
Scintillating fibers
Scintillation counters
Transfer functions
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Summary: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)/[Formula Omitted]-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.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2018.2841026