Title

Vibrational Excitation of Cis- and Trans-1, 2-Difluoroethenes by Electron Impact: Effect of Dipole Moment on the Threshold Peaks

Abstract

Vibrational excitation near threshold was measured in cis- and trans-difluoroethene with the aim of assessing the role of the dipole moment in threshold peaks. Threshold peaks were found in both the isomer with and the isomer without a permanent dipole moment, but only for IR-active vibrations. A comparison with cross sections calculated with the Born approximation revealed that a 'nontrivial' contribution to the threshold peaks, that is, one which cannot be explained by direct dipole excitation, is found only for the isomer with a permanent dipole moment (cis).

Publisher

IOP Publishing

Publication Date

1-1-2002

Publication Title

Journal of Physics B: Atomic, Molecular and Optical Physics

Department

Chemistry and Biochemistry

Document Type

Article

Language

English

Format

text

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