| 研究課題/領域番号 |
15J03633
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| 研究機関 | 岡山大学 |
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研究代表者 |
プレジャブ ナランゴー 岡山大学, 自然科学研究科, 特別研究員(DC2)
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| 研究期間 (年度) |
2015-04-24 – 2017-03-31
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| キーワード | single crystal / neutron diffraction / hydrous ringwoodite / hydrous wadsleyite |
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| 研究実績の概要 |
Syntheses of hydrous ringwoodite single-crystals were completed successfully. I conducted 19 experimental runs by using a scaled-up Kawai type cell. Two independent high quality single-crystals of hydrous ringwoodite were measured at the neutron time-of-flight Laue diffractometer at Oak Ridge National Laboratory, USA. The obtained neutron data were analyzed successfully and the results were presented at the Japanese Society of Neutron Science annual meeting 2015 as a poster presentation. During the syntheses of hydrous ringwoodite, I completed analyses of previously obtained single-crystal neutron data of hydrous wadsleyite. I already started the next project, which is to measure the atomic-scale dynamics of hydrogen by quasielastic neutron scattering for deep-earth hydrous minerals. Phase E samples were synthesized by using the above mentioned cell. Totally 11 experimental runs were carried out. First test quasielastic neutron scattering measurement had been conducted on powder sample of phase E.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
1: 当初の計画以上に進展している
理由
Before the submission of DC2 application, I planned to conduct the syntheses of high-quality single crystals of hydrous wadsleyite. I also planned its single-crystal neutron diffraction measurements in the first year. Also, a part of syntheses experiments of hydrous ringwoodite single crystals were planned in the end of the first year and to be continued in the second year with its neutron diffraction measurement. Fortunately, syntheses and neutron diffraction measurement of hydrous wadsleyite were made successfully after the submission of DC2 application. So I started the syntheses of hydrous ringwoodite single crystals work much earlier than originally planned and its neutron diffraction measurements were also successful. Also, the test measurement of quasielastic neutron scattering has been conducted for deep-earth hydrous minerals in the end of the first year.
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| 今後の研究の推進方策 |
For the next year, I will continue the project of atomic-scale dynamics of hydrogen by quasielastic neutron scattering in deep-earth hydrous minerals. For this project, I will conduct more additional syntheses experiments for phase E and measure its quasielastic neutron scattering at different temperatures. Then I will proceed the data analyses. Meanwhile, I will submit the manuscripts for single-crystal neutron diffraction of hydrous wadsleyite and ringwoodite, respectively. Finally, I will focus on writing the Ph.D thesis.
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