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Carbon monoxide entrapment in interstellar ice analogs

Collings, M. P.; Dever, J. W.; Fraser, H. J.; McCoustra, M. R. S. and Williams, D. A. (2003). Carbon monoxide entrapment in interstellar ice analogs. Astrophysical Journal, 583(2) pp. 1058–1062.

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The adsorption and desorption of CO on and from amorphous H2O ice at astrophysically relevant temperatures has been studied using temperature programmed desorption (TPD) and reflection-absorption infrared spectroscopy (RAIRS). Solid CO is able to diffuse into the porous structure of H2O at temperatures as low as 15 K. When heated, a phase transition between two forms of amorphous H2O ice occurs over the 30–70 K temperature range, causing the partial collapse of pores and the entrapment of CO. Trapped CO is released during crystallization and desorption of the H2O film. This behavior may have a significant impact on both gas-phase and solid-phase chemistry in a variety of interstellar environments.

Item Type: Journal Item
Copyright Holders: 2003 The American Astronomical Society.
ISSN: 1538-4357
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetUK Particle Physics and Astronomy Research Council (PPARC)
Keywords: astrochemistry; infrared - ISM; ISM - lines and bands; ISM - molecules; line - profiles; methods - laboratory
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 37221
Depositing User: Stephen Serjeant
Date Deposited: 20 Jun 2013 09:38
Last Modified: 07 Dec 2018 10:15
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