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Formation mechanisms of oxygen atoms in the O(1D2) state from the 157 nm photoirradiation of amorphous water ice at 90 K

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タイトル: Formation mechanisms of oxygen atoms in the O(1D2) state from the 157 nm photoirradiation of amorphous water ice at 90 K
著者: Hama, Tetsuya 著作を一覧する
Yabushita, Akihiro 著作を一覧する
Yokoyama, Masaaki 著作を一覧する
Kawasaki, Masahiro 著作を一覧する
Watanabe, Naoki 著作を一覧する
キーワード: amorphous state
desorption
free radical reactions
multiphoton processes
photodissociation
surface chemistry
water
発行日: 2009年 9月21日
出版者: American Institute of Physics
誌名: Journal of Chemical Physics
巻: 131
号: 11
開始ページ: 114510
出版社 DOI: 10.1063/1.3194798
抄録: Vacuum ultraviolet photolysis of water ice in the first absorption band was studied at 157 nm. Translational and internal energy distributions of the desorbed species, O(1D) and OH(ν = 0,1), were directly measured with resonance-enhanced multiphoton ionization method. Two different mechanisms are discussed for desorption of electronically excited O(1D) atoms from the ice surface. One is unimolecular dissociation of H2O to H2+O(1D) as a primary photoprocess. The other is the surface recombination reaction of hot OH radicals that are produced from photodissociation of hydrogen peroxide as a secondary photoprocess. H2O2 is one of the major photoproducts in the vacuum ultraviolet photolysis of water ice. © 2009 American Institute of Physics.
Rights: Copyright 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Chem. Phys. 131, 114510 (2009) and may be found at http://link.aip.org/link/?jcp/131/114510
Relation (URI): http://link.aip.org/link/?jcp/131/114510
資料タイプ: article
URI: http://hdl.handle.net/2115/39510
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 渡部 直樹

 

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