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Issue 5, 2016
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Efficient electron-promoted desorption of benzene from water ice surfaces

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Abstract

Desorption of benzene (C6H6) from solid water surfaces [compact amorphous solid water (c-ASW) and crystalline ice (CI)] during irradiation of ultrathin solid films with low energy (250–300 eV) electrons has been investigated. The observed desorption behaviour is complex but typically two desorption components, with particularly large cross-sections, were present in the observed signal. A fast component, with a cross-section up to 10−15 cm2, is attributed to desorption of isolated C6H6 molecules that are hydrogen-bonded to small clusters of water (H2O) molecules on the solid water surface. A slower component, with a cross-section of ca. 10−17 cm2, is attributed mainly to desorption from larger C6H6 islands on the solid water surface. Possible desorption mechanisms are proposed and astrophysical implications are discussed.

Graphical abstract: Efficient electron-promoted desorption of benzene from water ice surfaces

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Publication details

The article was received on 27 Oct 2015, accepted on 05 Jan 2016 and first published on 07 Jan 2016


Article type: Paper
DOI: 10.1039/C5CP06537B
Author version available: Download Author version (PDF)
Citation: Phys. Chem. Chem. Phys., 2016,18, 4026-4034
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    Efficient electron-promoted desorption of benzene from water ice surfaces

    D. Marchione, J. D. Thrower and M. R. S. McCoustra, Phys. Chem. Chem. Phys., 2016, 18, 4026
    DOI: 10.1039/C5CP06537B

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