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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 Parker
The 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.

History

Publication status

  • Published

Journal

Journal of Vacuum Science and Technology A

ISSN

0734-2101

Issue

4

Volume

26

Page range

919 - 924

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2014-07-23

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