Laboratory studies of the interaction of carbon monoxide with water ice

M P Collings, J W Dever, H J Fraser, M R S McCoustra

Research output: Contribution to journalArticle

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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.

LanguageEnglish
Pages633-659
Number of pages27
JournalAstrophysics and Space Science
Volume285
Issue number3-4
DOIs
Publication statusPublished - 2003

Fingerprint

carbon monoxide
ice
desorption
water
interactions
entrapment
atomic absorption spectroscopy
infrared spectroscopy
Fourier transform
water vapor
laboratory
absorption spectroscopy
depletion
temperature
vapor phases
timescale
matrix
matrices
gas

Keywords

  • astrochemistry
  • dust
  • molecular processes
  • amorphous solid water
  • molecular beams
  • infrared spectroscopy
  • desorption kinetics
  • thermal desorption

Cite this

Collings, M. P., Dever, J. W., Fraser, H. J., & McCoustra, M. R. S. (2003). Laboratory studies of the interaction of carbon monoxide with water ice. Astrophysics and Space Science, 285(3-4), 633-659. https://doi.org/10.1023/A:1026144806831
Collings, M P ; Dever, J W ; Fraser, H J ; McCoustra, M R S . / Laboratory studies of the interaction of carbon monoxide with water ice. In: Astrophysics and Space Science. 2003 ; Vol. 285, No. 3-4. pp. 633-659.
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Collings, MP, Dever, JW, Fraser, HJ & McCoustra, MRS 2003, 'Laboratory studies of the interaction of carbon monoxide with water ice' Astrophysics and Space Science, vol. 285, no. 3-4, pp. 633-659. https://doi.org/10.1023/A:1026144806831

Laboratory studies of the interaction of carbon monoxide with water ice. / Collings, M P ; Dever, J W ; Fraser, H J ; McCoustra, M R S .

In: Astrophysics and Space Science, Vol. 285, No. 3-4, 2003, p. 633-659.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Laboratory studies of the interaction of carbon monoxide with water ice

AU - Collings, M P

AU - Dever, J W

AU - Fraser, H J

AU - McCoustra, M R S

PY - 2003

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N2 - 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.

AB - 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.

KW - astrochemistry

KW - dust

KW - molecular processes

KW - amorphous solid water

KW - molecular beams

KW - infrared spectroscopy

KW - desorption kinetics

KW - thermal desorption

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SN - 0004-640X

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