论文信息 - Characteristics of the threshold structures in the e-H2O vibrational excitations

Characteristics of the threshold structures in the e-H2O vibrational excitations

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.

K. Rohr

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