Su, H;
Cheng, X;
Zhang, H;
Tennyson, J;
(2021)
Electro collisions with molecular nitrogen in its ground and electronically excited states using the R-matrix method.
JJournal of Physics B: Atomic, Molecular and Optical Physics
, 54
(11)
, Article 115203. 10.1088/1361-6455/abf9f0.
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Abstract
A comprehensive study of electron collisions with the X1Σg+ ground state as well as the metastable A3Σu+ and a1Πg excited states of the N2 molecule is reported using the fixed-nucleus R-matrix method. Integral elastic scattering and electronic excitation cross sections from the X1Σg+ ground state to the eight lowest electronic states, A3Σu+, B3Πg, W3Δu, B'3Σu−, a1Πg, a'1Σu−, w1Δu and C3Πu, overall agree well with the available experimental and theoretical results although updates of some recommended values are suggested. Accurate electron impact electronic transition cross sections starting from the A3Σu+ and a1Πg metastable excited states are reported. The total summed electronic transition cross sections from the a1Πg state is dominant: an order of magnitude higher than those of the X1Σg+ ground state. The de-excitation cross sections generally show a downward trend with increasing incident electron energy, which is different from the elastic and electronic excitation cross sections which generally increase with collision energy. There is a prominent 2Πu symmetry resonance peak at 2.8 eV for electronic de-excitation scattering of a1Πg → B3Πg, which significantly contributes to the total summed cross sections from the a1Πg excited state. The present results provide a new insight which will aid understanding of electron spectra in the atmosphere of the Earth and Titan.
| Type: | Article |
|---|---|
| Title: | Electro collisions with molecular nitrogen in its ground and electronically excited states using the R-matrix method |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1361-6455/abf9f0 |
| Publisher version: | http://dx.doi.org/10.1088/1361-6455/abf9f0 |
| Language: | English |
| Additional information: | Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
| Keywords: | electron collisions, electronic excitation, elastic scattering, cross sections, R-matrix method, nitrogen molecule, EXCITATION CROSS-SECTION, IMPACT EXCITATION, N-2, SCATTERING, N2, SYSTEM, DISSOCIATION |
| 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/10129992 |
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