Ayouz, M;
Faure, A;
Tennyson, J;
Tudorovskaya, M;
Kokoouline, V;
(2021)
Cross sections and rate coefficients for vibrational excitation of h<inf>2</inf>o by electron impact.
Atoms
, 9
(3)
, Article 62. 10.3390/atoms9030062.
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Abstract
Cross-sections and thermally averaged rate coefficients for vibration (de-)excitation of a water molecule by electron impact are computed; one and two quanta excitations are considered for all three normal modes. The calculations use a theoretical approach that combines the normal mode approximation for vibrational states of water, a vibrational frame transformation employed to evaluate the scattering matrix for vibrational transitions and the UK molecular R-matrix code. The interval of applicability of the rate coefficients is from 10 to 10,000 K. A comprehensive set of calculations is performed to assess uncertainty of the obtained data. The results should help in modelling non-LTE spectra of water in various astrophysical environments.
| Type: | Article |
|---|---|
| Title: | Cross sections and rate coefficients for vibrational excitation of h<inf>2</inf>o by electron impact |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3390/atoms9030062 |
| Publisher version: | https://doi.org/10.3390/atoms9030062 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Water; vibrational excitation; R-matrix; electron-molecule collisions; interstellar medium |
| 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 Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10135354 |
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