Abdulgalil, AGM;
Rosu-Finsen, A;
Marchione, D;
Thrower, JD;
Collings, MP;
McCoustra, MRS;
(2017)
Electron-Promoted Desorption from Water Ice Surfaces: Neutral Gas Phase Products.
ACS Earth and Space Chemistry
, 1
(4)
pp. 209-215.
10.1021/acsearthspacechem.7b00028.
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Abstract
Electron-promoted desorption (EPD) from compact amorphous solid water (c-ASW) has been studied. Low-energy electron bombardment with 200–300 eV electrons leads to H2O depletion, as monitored by reflection–absorption infrared spectroscopy (RAIRS) of the remaining c-ASW film. Cross sections for H2O depletion were calculated to be in the range from 1.6 ± 1.0 × 10–16 to 5.2 ± 3.0 × 10–16 cm2. However, mass spectrometric measurements identify a major component of the desorbing material as H2, which appears with kinetics similar to those for H2O loss. Molecular H2O is observed as a minor desorption product in the gas phase.
| Type: | Article |
|---|---|
| Title: | Electron-Promoted Desorption from Water Ice Surfaces: Neutral Gas Phase Products |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acsearthspacechem.7b00028 |
| Publisher version: | http://dx.doi.org/10.1021/acsearthspacechem.7b0002... |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | electron irradiation; H2O; ISM; molecular cloud; non-thermal desorption |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10054090 |
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