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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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| Accessrights |
open access |
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en
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 https://dx.doi.org/10.1063/1.3194798
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| Subject |
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Other
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amorphous state
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Other
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desorption
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Other
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free radical reactions
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Other
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multiphoton processes
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Other
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photodissociation
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Other
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surface chemistry
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Other
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water
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NDC
428
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| Description |
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Abstract
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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.
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American Institute of Physics
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| Resource Type |
journal article |
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VoR |
| Identifier |
HDL
http://hdl.handle.net/2115/39510
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DOI
https://doi.org/10.1063/1.3194798
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| Journal |
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Journal of Chemical Physics
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Volume Number131
Issue Number11
Page Start114510
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| Oaidate |
2023-07-26 |
