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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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Title: Formation mechanisms of oxygen atoms in the O(1D2) state from the 157 nm photoirradiation of amorphous water ice at 90 K
Authors: Hama, Tetsuya Browse this author
Yabushita, Akihiro Browse this author
Yokoyama, Masaaki Browse this author
Kawasaki, Masahiro Browse this author
Watanabe, Naoki Browse this author →KAKEN DB
Keywords: amorphous state
free radical reactions
multiphoton processes
surface chemistry
Issue Date: 21-Sep-2009
Publisher: American Institute of Physics
Journal Title: Journal of Chemical Physics
Volume: 131
Issue: 11
Start Page: 114510
Publisher DOI: 10.1063/1.3194798
Abstract: 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
Type: article
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 渡部 直樹

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