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Laboratory studies of the interaction of carbon monoxide with water ice

Collings, M. P.; Dever, J. W.; Fraser, H. J. and McCoustra, M. R. S. (2003). Laboratory studies of the interaction of carbon monoxide with water ice. Astrophysics and Space Science, 285(3-4) pp. 633–659.

DOI (Digital Object Identifier) Link: https://doi.org/10.1023/A:1026144806831
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Abstract

The interaction of carbon monoxide (CO) with vapour deposited water (H2O) ices has been studied using temperature programmed desorption (TPD) and Fourier transform reflection absorption infrared spectroscopy (FT-RAIRS) over a range of astrophysically relevant temperatures. Such measurements have shown that CO desorption from amorphous H2O ices is a much more complex process than current astrochemical models suggest. Re-visiting previously reported laboratory experiments (Collings et al., 2003), a rate model has been constructed to explain, in a phenomenological manner, the desorption of CO over astronomically relevant timescales. The model presented here can be widely applied to a range of astronomical environments where depletion of CO from the gas phase is relevant. The model accounts for the two competing processes of CO desorption and migration, and also enables the entrapment of some of the CO in the ice matrix and its subsequent release as the water ice crystallises and then desorbs. The astronomical implications of this model are discussed.

Item Type: Journal Item
Copyright Holders: 2003 Kluwer Academic Publishers
ISSN: 1572-946X
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetUK Particle Physics and Astronomy Research Council (PPARC)
Not SetNot SetLeverhulme Trust
Keywords: astrochemistry; dust; molecular processes
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 37224
Depositing User: Stephen Serjeant
Date Deposited: 20 Jun 2013 10:36
Last Modified: 19 Dec 2017 10:04
URI: http://oro.open.ac.uk/id/eprint/37224
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