Affiliation:
1. Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
Abstract
We have recorded reflection–absorption infrared spectroscopy (RAIRS) and temperature-programmed desorption (TPD) data for a range of CO
2
-bearing model astrophysical ices adsorbed on a graphitic dust grain analogue surface. Data have been recorded for pure CO
2
, for CO
2
adsorbed on top of amorphous solid water, for mixed CO
2
:H
2
O ices and for CO
2
adsorbed on top of a mixed CH
3
OH:H
2
O ice. For the TPD data, kinetic parameters for desorption have been determined, and the trapping behaviour of the CO
2
in the H
2
O (CH
3
OH) ice has been determined. Data of these types are important as they can be used to model desorption in a range of astrophysical environments. RAIR spectra have also shown the interaction of the CO
2
with H
2
O and CH
3
OH and can be used to compare with astronomical observations, allowing the accurate assignment of spectra.
Subject
General Physics and Astronomy,General Engineering,General Mathematics
Cited by
28 articles.
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