Characteristics of the threshold structures in the e-H2O vibrational excitations
- 21 December 1977
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 10 (18), L735-L738
- https://doi.org/10.1088/0022-3700/10/18/012
Abstract
The strong threshold structures in the vibrational excitation of H2O molecules by electron impact have been studied in a crossed-beam experiment. Results for the widths, energetic positions, cross sections and angular dependences have been obtained for the fundamentals of the nu 1.3 (stretching) and the nu 2 (bending) modes. The experiments indicate that the threshold peak in the nu 2 mode is strongly influenced by the direct dipole excitation while for the nu 1.3 modes a resonant excitation mechanism corresponding to that proposed for the hydrogen halides should be dominating.Keywords
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