Sticking coefficients for atoms and molecules at the surfaces of interstellar dust grains

A fully quantum mechanical model of the particle–surface sticking process is developed, and calculations are performed for a variety of atoms, molecules and solids of relevance to the interstellar medium. The sticking coefficient is a sensitive function of the nature of the particle–surface interact...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 1985-03, Vol.213 (2), p.295-306
Main Authors: Leitch-Devlin, M. A., Williams, D. A.
Format: Article
Language:English
Subjects:
Astronomy
Earth, ocean, space
Exact sciences and technology
Interstellar medium (ism) and nebulae in milky way
Molecular clouds, h2 clouds, dense clouds, and dark clouds
Stellar systems. Galactic and extragalactic objects and systems. The universe
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Summary:A fully quantum mechanical model of the particle–surface sticking process is developed, and calculations are performed for a variety of atoms, molecules and solids of relevance to the interstellar medium. The sticking coefficient is a sensitive function of the nature of the particle–surface interaction and the lattice phonon spectrum. Soft lattices and/or chemical adsorption ensure high sticking coefficients. For hard lattices and physical adsorption, sticking is unlikely to occur. The consequences for surface reactions in the interstellar medium are briefly discussed.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/213.2.295