Carbon Monoxide Entrapment in Interstellar Ice Analogs

Details Carbon Monoxide Entrapment in Interstellar Ice Analogs Carbon Monoxide Entrapment in Interstellar Ice Analogs

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...583.1058c&link_type=abstract

The Astrophysical Journal, Volume 583, Issue 2, pp. 1058-1062.

Astronomy and Astrophysics

Astronomy

72

Astrochemistry, Infrared: Ism, Ism: Lines And Bands, Ism: Molecules, Line: Profiles, Methods: Laboratory

Scientific paper

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.

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