UV-Induced Formation of Ice XI Observed Using an Ultra-High Vacuum Cryogenic Transmission Electron Microscope and its Implications for Planetary Science

Kouchi, Akira; Kimura, Yuki; Kitajima, Kensei; Katsuno, Hiroyasu; Hidaka, Hiroshi; Oba, Yasuhiro; Tsuge, Masashi; Yamazaki, Tomoya; Fujita, Kazuyuki; Hama, Tetsuya; Takahashi, Yukihiro; Nakatsubo, Shunichi; Watanabe, Naoki

UV-Induced Formation of Ice XI Observed Using an Ultra-High Vacuum Cryogenic Transmission Electron Microscope and its Implications for Planetary Science

Kouchi, Akira; Kimura, Yuki; Kitajima, Kensei et al.

Frontiers in Chemistry, 2021, 9, 799851

Permalink : https://hdl.handle.net/2115/83897

このアイテムのアクセス数:453件（2026-01-16 22:08 集計）

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アクセス権	metadata only access
URI	https://hdl.handle.net/2115/83897
タイトル	UV-Induced Formation of Ice XI Observed Using an Ultra-High Vacuum Cryogenic Transmission Electron Microscope and its Implications for Planetary Science
著者	Kouchi, Akira ; Kimura, Yuki ; Kitajima, Kensei ; Katsuno, Hiroyasu ; Hidaka, Hiroshi ; Oba, Yasuhiro ; Tsuge, Masashi ; Yamazaki, Tomoya ; Fujita, Kazuyuki ; Hama, Tetsuya ; Takahashi, Yukihiro ; Nakatsubo, Shunichi ; Watanabe, Naoki
e-Rad_Researcher 60161866 著者名 Kouchi, Akira
e-Rad_Researcher 50449542 著者名 Kimura, Yuki
e-Rad_Researcher 70845445 著者名 Kitajima, Kensei
著者名 Katsuno, Hiroyasu
e-Rad_Researcher 00400010 著者名 Hidaka, Hiroshi
著者名 Oba, Yasuhiro
著者名 Tsuge, Masashi
著者名 Yamazaki, Tomoya
著者名 Fujita, Kazuyuki
著者名 Hama, Tetsuya
著者名 Takahashi, Yukihiro
著者名 Nakatsubo, Shunichi
e-Rad_Researcher 50271531 著者名 Watanabe, Naoki
言語	英語
キーワード	ice XI
	hydrogen atom ordering
	UV-rays
	transmission electron microscopy
	solar system ices
発行日	2021-12-08
出版者	Frontiers Media
収録物名	Frontiers in Chemistry
巻(号)	9
ページ	799851
抄録	The occurrence of hydrogen atom-ordered form of ice Ih, ice XI, in the outer Solar System has been discussed based on laboratory experiments because its ferroelectricity influences the physical processes in the outer Solar System. However, the formation of ice XI in that region is still unknown due to a lack of formation conditions at temperatures higher than 72 K and the effect of UV-rays on the phase transition from ice I to ice XI. As a result, we observed the UV-irradiation process on ice Ih and ice Ic using a newly developed ultra-high vacuum cryogenic transmission electron microscope. We found that ice Ih transformed to ice XI at temperatures between 75 and 140 K with a relatively small UV dose. Although ice Ic partially transformed to ice XI at 83 K, the rate of transformation was slower than for ice Ih. These findings point to the formation of ice XI at temperatures greater than 72 K via UV irradiation of ice I crystals in the Solar System; icy grains and the surfaces of icy satellites in the Jovian and Saturnian regions.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	2296-2646
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3389/fchem.2021.799851