Vibrational excitation of ethane by electron impact
- 14 June 1990
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 23 (11) , 1905-1913
- https://doi.org/10.1088/0953-4075/23/11/023
Abstract
Differential cross sections for electron impact vibrational excitation of ethane (C2H6) have been determined for incident energies from 3 to 20 eV over a scattering angular range of 20' to 130'. In addition, vibrational excitation functions were determined for impact energies of 2 to 15 eV at scattering angles of 30', 60', 90' and 120'. These measurements confirm the broad shape resonance at 7.5 eV but provide no evidence for a (second) resonance near 2.3 eV. A decomposition of the vibrational energy-loss spectrum shows strong resonance enhancement of selected vibrational modes, which may be explained by decay of a temporary negative ion (TNI) of symmetry species eu. A continuum multiple scattering calculation (CMS) reproduces these experimental results fairly well and indicates the simultaneous involvement of a TNI of species a2u.Keywords
This publication has 17 references indexed in Scilit:
- Decomposition of normal-coordinate vibrational frequenciesThe Journal of Physical Chemistry, 1989
- Elastic and inelastic scattering of electrons by methane and ethaneJournal of Physics B: Atomic and Molecular Physics, 1985
- Ab initio theoretical frequencies and intensities in the interpretation of infrared spectraJournal of the American Chemical Society, 1984
- Raman intensities of ethane and deuterated derivativesThe Journal of Chemical Physics, 1984
- Negative ions of polyatomic molecules.Environmental Health Perspectives, 1980
- Excited states and photochemistry of saturated molecules. Minimal plus Rydberg basis set calculations on the vertical spectra of CH4, C2H6, C3H8, and n-C4H10Chemical Physics Letters, 1978
- Angular distributions for the excitation of vibronic states by resonant electron molecule reactionsJournal of Physics B: Atomic and Molecular Physics, 1971
- Angular distributions for resonant scattering of electrons by moleculesJournal of Physics B: Atomic and Molecular Physics, 1968
- The calculation of force constants and normal coordinates—V constrained force fields for a series of methyl and dimethyl compounds of 3-fold symmetrySpectrochimica Acta, 1964
- On the symmetries of spherical harmonicsMathematical Proceedings of the Cambridge Philosophical Society, 1957