Carbon monoxide entrapment in interstellar ice analogs

M.P. Collings, J.W. Dever, H.J. Fraser, M.R.S. McCoustra, D.A. Williams

Research output: Contribution to journalArticle

152 Citations (Scopus)

Abstract

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.
LanguageEnglish
Pages1058-1062
Number of pages4
JournalAstrophysical Journal
Volume583
DOIs
Publication statusPublished - 1 Feb 2003

Fingerprint

entrapment
carbon monoxide
desorption
ice
analogs
phase transition
solid phases
crystallization
temperature
spectroscopy
chemistry
vapor phases
adsorption
porosity
gas

Keywords

  • astrochemistry
  • infrared
  • molecules
  • nanoscience

Cite this

Collings, M. P., Dever, J. W., Fraser, H. J., McCoustra, M. R. S., & Williams, D. A. (2003). Carbon monoxide entrapment in interstellar ice analogs. Astrophysical Journal, 583, 1058-1062. https://doi.org/10.1086/345389
Collings, M.P. ; Dever, J.W. ; Fraser, H.J. ; McCoustra, M.R.S. ; Williams, D.A. / Carbon monoxide entrapment in interstellar ice analogs. In: Astrophysical Journal. 2003 ; Vol. 583. pp. 1058-1062.
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Collings, MP, Dever, JW, Fraser, HJ, McCoustra, MRS & Williams, DA 2003, 'Carbon monoxide entrapment in interstellar ice analogs' Astrophysical Journal, vol. 583, pp. 1058-1062. https://doi.org/10.1086/345389

Carbon monoxide entrapment in interstellar ice analogs. / Collings, M.P.; Dever, J.W.; Fraser, H.J.; McCoustra, M.R.S.; Williams, D.A.

In: Astrophysical Journal, Vol. 583, 01.02.2003, p. 1058-1062.

Research output: Contribution to journalArticle

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AU - Fraser, H.J.

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AB - 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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KW - molecules

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Collings MP, Dever JW, Fraser HJ, McCoustra MRS, Williams DA. Carbon monoxide entrapment in interstellar ice analogs. Astrophysical Journal. 2003 Feb 1;583:1058-1062. https://doi.org/10.1086/345389