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Thermal desorption characteristics of CO, O2 and CO2 on non-porous water, crystalline water and silicate surfaces at submonolayer and multilayer coverages

Noble, J. A.; Congiu, E.; Dulieu, F. and Fraser, H. J. (2012). Thermal desorption characteristics of CO, O2 and CO2 on non-porous water, crystalline water and silicate surfaces at submonolayer and multilayer coverages. Monthly Notices of the Royal Astronomical Society, 421(1) pp. 768–779.

DOI (Digital Object Identifier) Link: https://doi.org/10.1111/j.1365-2966.2011.20351.x
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Abstract

The desorption characteristics of molecules on interstellar dust grains are important for modelling the behaviour of molecules in icy mantles and, critically, in describing the solid–gas interface. In this study, a series of laboratory experiments exploring the desorption of three small molecules from three astrophysically relevant surfaces is presented. The desorption of CO, O2 and CO2 at both submonolayer and multilayer coverages was investigated from non-porous water, crystalline water and silicate surfaces. Experimental data were modelled using the Polanyi–Wigner equation to produce a mathematical description of the desorption of each molecular species from each type of surface, uniquely describing both the monolayer and multilayer desorption in a single combined model. The implications of desorption behaviour over astrophysically relevant time-scales are discussed.

Item Type: Journal Item
Copyright Holders: 2012 The Authors, 2012 RAS (Monthly Notices of the Royal Astronomical Society)
ISSN: 1365-2966
Keywords: astrochemistry; methods - laboratory; ISM - molecules.
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 37279
Depositing User: Helen Fraser
Date Deposited: 04 Apr 2013 08:47
Last Modified: 19 Dec 2017 10:04
URI: http://oro.open.ac.uk/id/eprint/37279
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