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Role of OH radicals in the formation of oxygen molecules following vacuum ultraviolet photodissociation of amorphous solid water

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Title: Role of OH radicals in the formation of oxygen molecules following vacuum ultraviolet photodissociation of amorphous solid water
Authors: Hama, Tetsuya Browse this author
Yokoyama, Masaaki Browse this author
Yabushita, Akihiro Browse this author
Kawasaki, Masahiro Browse this author
Keywords: adsorption
atom-ion reactions
free radicals
noncrystalline structure
oxygen compounds
photodissociation
photoexcitation
time of flight spectra
Issue Date: 14-Sep-2010
Publisher: American Institute of Physics
Journal Title: Journal of Chemical Physics
Volume: 133
Issue: 10
Start Page: 104504
Publisher DOI: 10.1063/1.3474999
PMID: 20849175
Abstract: Photodesorption of O2 (X3 Σ^[-]_[g]) and O2 (a 1Δg) from amorphous solid water at 90 K has been studied following photoexcitation within the first absorption band at 157 nm. Time-of-flight and rotational spectra of O2 reveal the translational and internal energy distributions, from which production mechanisms are deduced. Exothermic and endothermic reactions of OH+O(3P) are proposed as plausible formation mechanisms for O2(X 3Σ^[-]_[g] and a 1Δg). To examine the contribution of the O(3P) + O(3P) recombination reaction to the O2 formation following 157 nm photolysis of amorphous solid water, O2 products following 193 nm photodissociation of SO2 adsorbed on amorphous solid water were also investigated.
Rights: Copyright 2010 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. 133, 104504 (2010) and may be found at https://dx.doi.org/10.1063/1.3474999
Type: article
URI: http://hdl.handle.net/2115/49425
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: 羽馬 哲也

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