Surface science investigations of photoprocesses in model interstellar ices

Thrower, J D, Collings, M P, McCoustra, M R S, Burke, D J, Brown, W A, Dawes, A, Holtom, P D, Kendall, P, Mason, N J, Jamme, F, Fraser, H J, Clark, I P and Parker, A W (2008) Surface science investigations of photoprocesses in model interstellar ices. Journal of Vacuum Science and Technology A, 26 (4). 919 - 924. ISSN 0734-2101

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Abstract

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.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science
Depositing User: Deeptima Massey
Date Deposited: 23 Jul 2014 09:52
Last Modified: 23 Jul 2014 09:52
URI: http://sro.sussex.ac.uk/id/eprint/48695
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