| Project/Area Number |
18H05224
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| Research Category |
Grant-in-Aid for Scientific Research (S)
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| Allocation Type | Single-year Grants |
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| Review Section |
Broad Section B
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KAGI HIROYUKI 東京大学, 大学院理学系研究科(理学部), 教授 (70233666)
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| Co-Investigator(Kenkyū-buntansha) |
小松 一生 東京大学, 大学院理学系研究科(理学部), 准教授 (50541942)
青木 勝敏 東京大学, 大学院理学系研究科(理学部), 客員共同研究員 (30356331)
佐野 亜沙美 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 J－PARCセンター, 研究主幹 (30547104)
柿澤 翔 公益財団法人高輝度光科学研究センター, 回折・散乱推進室, テニュアトラック研究員 (10846819)
飯塚 理子 東京大学, 大学院理学系研究科(理学部), 客員共同研究員 (80632413)
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| Project Period (FY) |
2018-06-11 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥193,050,000 (Direct Cost: ¥148,500,000、Indirect Cost: ¥44,550,000)
Fiscal Year 2022: ¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2021: ¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2020: ¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2019: ¥74,750,000 (Direct Cost: ¥57,500,000、Indirect Cost: ¥17,250,000)
Fiscal Year 2018: ¥66,430,000 (Direct Cost: ¥51,100,000、Indirect Cost: ¥15,330,000)
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| Keywords | 水素 / 中性子回折 / 高圧 / 鉄水素化物 / 氷 / 地球深部 / 惑星深部 / 地球内部 / 高圧下中性子回折 / 塩水和物 / 地球 / 惑星 |
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| Outline of Final Research Achievements |
While developing methods for neutron diffraction experiments under high pressure, we have succeeded in elucidating the structure and properties of hydrous minerals that can exist in the Earth's interior, hydrogen in iron that makes up the Earth's core, and ice that makes up the ice planets. By elucidating the hydrogen position s, which cannot be resolved by other methods, this research has led to the discovery of a new polymorph of ice that have not been found before, the elucidation of the hydrogen-induced volume expansion rate of iron, which could limit the chemical composition of the Earth's core, and new issues such as the pressure response of hydrogen bonds, which could limit the deformation mechanisms of minerals that make up the Earth's interior. It is no exaggeration to say that we have established the discipline of hydrogen material science in earth and planetary science.
Translated with DeepL.com (free version)
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で得られた研究成果の学術的意義はきわめて大きい。地表から最も遠い地球核の化学組成は鉄を主成分としており、何らかの軽元素が含まれることが古くから指摘されているが、具体的な化学組成は未解明である。本研究成果は地球核の化学組成に大きな制限を加えることになるだろう。また、新たな氷の多形の発見は、水という我々にとって最も身近な物質にもまだまだ解明されていない問題があると言うことを世の中に示すことができた。この研究成果は一般の方にも興味をもたれており、社会的な意義も大きい。
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| Assessment Rating |
Ex-post Assessment Comments (Rating)
A: In light of the aim of introducing the research area into the research categories, expected outcomes of research have been produced.
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Assessment Rating |
Interim Assessment Comments (Rating)
A: In light of the aim of introducing the research area into the research categories, the expected progress has been made in research.
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