2019 Fiscal Year Annual Research Report
Atomic scale diffusion dynamics of hydrogen in deep-Earth minerals by pulsed neutron scattering
| Project/Area Number |
17F17331
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| Research Institution | Okayama University |
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Principal Investigator |
奥地 拓生 岡山大学, 惑星物質研究所, 准教授 (40303599)
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| Co-Investigator(Kenkyū-buntansha) |
PUREVJAV NARANGOO 岡山大学, 惑星物質研究所, 外国人特別研究員
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| Project Period (FY) |
2017-11-10 – 2020-03-31
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| Keywords | neutron scattering / hydrogen dynamics / crystal structure / DHMS Phase E |
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| Outline of Annual Research Achievements |
The research achevements in this year consisted of two series of neutron scattering experimental results, which are quasielastic neutron scattering (QENS) and single crystal neutron diffraction (SCND). The QENS analysis of hydrogen in dense hydrous magnesium silicate (DHMS) phase E was conducted at BL2 at MLF, J-PARC. Atomic-scale diffusion dynamics of hydrogen was successfully determined as a function of temperature up to 530 K. The SCND measurement of a fully-deuterated DHMS phase E crystal was conducted at BL12 at Spallation Neutron Source, Oak Ridge National Laboratory in last year. This year, by systematically analyzing the obtained diffraction dataset, we fully resolved its crystal structure with very high resolution in space (dmin =0.5). The site position of deuterium, its chemical bonding geometry, as well as its incorporation mechanism into the crystal structure were deterimned and published. We made a few presentations in domestic and international meetings to present the described results and progress.
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| Research Progress Status |
令和元年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和元年度が最終年度であるため、記入しない。
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Research Products
(4 results)
