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Title: 高圧氷物質の実験分子動力学
Other Titles: Experimental molecular dynamics of ice-related materials at high pressure
Authors: 奥地, 拓生1 Browse this author
Authors(alt): Okuchi, Takuo1
Issue Date: 31-Mar-2008
Publisher: 北海道大学低温科学研究所
Journal Title: 低温科学
Journal Title(alt): Low Temperature Science
Volume: 66
Start Page: 169
End Page: 174
Abstract: 宇宙空間から惑星内部にわたる多様な惑星形成・進化の場には,極低温から高温,また真空から超高圧までの,あらゆる外場条件が存在する.氷はこの多様な条件に対応して,自由な陽子の急速な拡散を始めとする多様な性質を示すことが理論的に予想されているが,その実験的立証はいまだに行われ ていない.このような実験を行うためには,従来の高圧実験技術を活用しつつも,さらに新しい手法をその上に作りあげる必要があった.筆者がそのために開発してきたダイヤモンドアンビルセルNMR の手法と成果を解説し,また将来への展望を述べる.
We provide a novel diamond anvil cell NMR technique which enables high-resolution nuclear magnetic resonance spectroscopy at very high pressures. Here the technique is briefly explained,along with some good example of its application. We report high resolution NMR spectra and relaxation times of filled-ice II and Ic hydrogen hydrates at high pressures. These were taken in-situ at pressures to 3.6 GPa. Guest H2 in the hydrates gave a narrow resonance indicating their fast transport between cavity sites within various H2O ice structures. The hopping frequency was obtained from their relaxation times, giving a liquid-like diffusion coefficient that was not much sensitive to pressure.
Description: 3章 惑星における氷の物質と化学
Type: bulletin (article)
Appears in Collections:低温科学 = Low Temperature Science > 第66巻

Submitter: 低温科学研究所図書室

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