Halmova, G;
Tennyson, J;
(2008)
Resonances in electron-impact electron detachment of C-2(-).
PHYS REV LETT
, 100
(21)
, Article 213202. 10.1103/PhysRevLett.100.213202.
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Abstract
Molecular R-matrix with pseudostate calculations are reported for the electron-impact ionization cross section of the carbon dimer anion. A (1)Sigma(+)(g) g resonance is found near the detachment threshold and two further resonances, of (3)Pi(g) and (1)Pi(g) symmetry, are found near 10 eV close to the structures observed experimentally. These unusual shape resonances are a result of the competition between the repulsive Coulomb interaction and the large, attractive polarizability of C-2(-). Use of the Born approximation to allow for higher partial waves gives a total cross section close to that observed experimentally.
| Type: | Article |
|---|---|
| Title: | Resonances in electron-impact electron detachment of C-2(-) |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.100.213202 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.100.213202 |
| Language: | English |
| Additional information: | © 2008 The American Physical Society |
| Keywords: | MOLECULAR R-MATRIX, INTERMEDIATE ENERGIES, COLLISIONS, C-2(2-), IONIZATION, DIANION, ANIONS, STATES |
| 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/16892 |
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