Carbon monoxide entrapment in interstellar ice analogs

Mark P Collings; John W Dever; Helen J Fraser; Martin R S  McCoustra; David A Williams

doi:10.1086/345389

Carbon monoxide entrapment in interstellar ice analogs

Mark P Collings, John W Dever, Helen J Fraser, Martin R S McCoustra, David A Williams

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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.

Original language	English
Pages (from-to)	1058-1062
Number of pages	5
Journal	Astrophysical Journal
Volume	583
Issue number	2
DOIs	https://doi.org/10.1086/345389
Publication status	Published - 1 Feb 2003

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title = "Carbon monoxide entrapment in interstellar ice analogs",

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.",

author = "Collings, {Mark P} and Dever, {John W} and Fraser, {Helen J} and McCoustra, {Martin R S} and Williams, {David A}",

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T1 - Carbon monoxide entrapment in interstellar ice analogs

AU - Collings, Mark P

AU - Dever, John W

AU - Fraser, Helen J

AU - McCoustra, Martin R S

AU - Williams, David A

PY - 2003/2/1

Y1 - 2003/2/1

N2 - 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.

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.

U2 - 10.1086/345389

DO - 10.1086/345389

M3 - Article

SN - 0004-637X

VL - 583

SP - 1058

EP - 1062

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

Carbon monoxide entrapment in interstellar ice analogs

Abstract

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