Dopant concentration dependence of radiation-induced positive hysteresis of Ce:GSO and Ce:GSOZ |
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| Institution: | 1. Kyushu Institute of Technology, Frontier Research Academy for Young Researchers, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu 808-0196, Japan;2. School of Engineering, Nagoya University, Furocho, Chigusa, Nagoya 464-8603, Japan;1. Shanghai Key Laboratory of Special Artificial Microstructure Material & Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, PR China;2. Research Centre of Laser Fusion, Chinese Academy of Engineering Physics, Mianyang, 621900, PR China;1. Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara, Japan;2. Department of Electrical and Computer Engineering, University of Saskatchewan, 57 Campus Dr., Saskatoon, SK, Canada;1. Co-creative Research Center of Industrial Science and Technology, Kanazawa Institute of Technology (KIT), 3–1 Yatsukaho, Hakusan, Ishikawa 924-0838, Japan;2. Division of Radiation Oncology, Graduate School of Medicine, Kobe University, 7–5-2 Kusunokicho, Chuouku, Kobe, Hyogo 650-0017, Japan;3. Department of Applied Chemistry, Tohoku University, 6–6-07 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan;4. Division of Materials Science, Nara Institute of Science and Technology (NAIST), 8916–5 Takayama, Ikoma, Nara 630-0192, Japan |
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| Abstract: | Positive hysteresis and radiation tolerance to high-dose radiation exposure were investigated for Ce 0.5, 1, and 1.5%-doped Gd2SiO5 (GSO) and for Zr co-doped GSO with the same Ce concentrations (GSOZ). When they were irradiated by 200–800 Gy 60Co in 200 Gy steps, all Ce-doped GSO samples exhibited light yield enhancement (positive hysteresis). On the other hand, the light yield of GSOZ decreased greatly. Ce 0.5%-doped GSO showed the highest positive hysteresis, with ∼20% light yield enhancement. When the Ce concentration was increased, the positive hysteresis became weaker. |
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| Keywords: | Scintillation detector Single crystal Gamma-ray Positive hysteresis GSO GSO:Ce GSO:Ce Zr codoped |
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