Improvement of scintillation properties of new type scintillator crystals with gadolinium ions based on electronic structure analysis
| Project/Area Number |
26420673
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Yamagata University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
小笠原 一禎 関西学院大学, 理工学部, 教授 (10283631)
黒澤 俊介 東北大学, 未来科学技術共同研究センター, 准教授 (80613637)
渡邊 真太 関西学院大学, 理工学研究科, 研究員 (30554828)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | シンチレーター / 分光学 / 結晶欠陥 / シンチレータ / Ce:GAGG / 赤外分光 / 放射光 / 自由電子レーザー / 電子捕獲中心 / 二価金属イオン共添加 / 電子トラップ |
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| Outline of Final Research Achievements |
We have investigated the origin of shallow electron traps in Ce:GAGG crystals by using various spectroscopy techniques, in order to improve scintillation properties of this material. It turned out that shallow electron traps are composed of Gd2+ ions adjacent to oxygen vacancies. The Gd2+ ions are antisite defects occupying B sites in the garnet lattice. The first-principles calculations revealed antisite Gd2+ ions are introduced due to cation deficiency at the B sites. The reduction of cation deficiency is the best way to improve scintillation properties of Ce:GAGG crystals. To do so, it was found that Mg2+ codoping is useful.
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Report
(5 results)
Research Products
(49 results)
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[Presentation] Scintillation Properties of Large Size Ce:La-GPS Crystals Grown by the Czochralski Process2015
Author(s)
Kurosawa, Shoji, Murakami, Kitaura, Jary, Pejchal, Ohashi, Yokota, Kamada, Ohnishi, Nikl, Yoshikawa
Organizer
The 13th International Conference on Inorganic Scintillators and Their Applications
Place of Presentation
Berkley, California, USA
Year and Date
2015-06-07
Related Report
Int'l Joint Research
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