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Surface science investigations of photoprocesses in model interstellar ices
journal contribution
posted on 2023-06-08, 17:15 authored by J D Thrower, M P Collings, M R S McCoustra, D J Burke, Wendy BrownWendy Brown, A Dawes, P D Holtom, P Kendall, N J Mason, F Jamme, H J Fraser, I P Clark, A W ParkerThe kinetic energy of benzene and water molecules photodesorbed from astrophysically relevant ices on a sapphire substrate under irradiation by a UV laser tuned to the S-1 <- S-0 pi -> pi* transition of benzene has been measured using time-of-flight mass spectrometry. Three distinct photodesorption mechanisms have been identified - a direct adsorbate-mediated desorption of benzene, an indirect adsorbate-mediated desorption of water, and a substrate-mediated desorption of both benzene and water. The translational temperature of each desorbing population was well in excess of the ambient temperature of the ice matrix. (C) 2008 American Vacuum Society.
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Publication status
- Published
Journal
Journal of Vacuum Science and Technology AISSN
0734-2101External DOI
Issue
4Volume
26Page range
919 - 924Department affiliated with
- Chemistry Publications
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- No
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- Yes
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2014-07-23Usage metrics
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