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AbstractAbstract
[en] In a crossed-beam experiment, vibrational excitation (VE) of ethane by electron impact has been measured for collision energies in the range E = 1- 10 eV. The energy resolution is 30 meV (FWHM) in the energy-loss mode. The observed VE processes are divided into three groups: (i) CH stretching modes with a mean energy loss of ΔE = 365 meV; (ii) CH3 deformation modes with ΔE = 180 meV; (iii) CC carbon chain vibrations with ΔE = 125 meV. Absolute differential and integral cross sections are determined for the three groups of vibrations. The results are interpreted by two principal VE mechanisms: direct excitation for energies below 3 eV and resonant excitation for energies around 7-8 eV. At low energies (E < 3 eV) the present results are compared with the results from swarm experiments, while for E ≥ 3 eV the present measurements resolve some discrepancies between the results of two previous beam experiments. The present work complements a previous study by the same authors on elastic e-C2H6 scattering in this energy range
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Source
S0953-4075(03)56715-3; Available online at http://stacks.iop.org/0953-4075/36/1143/b30606.pdf or at the Web site for the Journal of Physics. B, Atomic, Molecular and Optical Physics (ISSN 1361-6455) http://www.iop.org/; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Journal
Journal of Physics. B, Atomic, Molecular and Optical Physics; ISSN 0953-4075;
; CODEN JPAPEH; v. 36(6); p. 1143-1159

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