Vibrational-excitation cross sections of water molecules by electron impact

Details Vibrational-excitation cross sections of water molecules by electron impact Vibrational-excitation cross sections of water molecules by electron impact

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phrva..38..678s&link_type=abstract

Physical Review A - General Physics, 3rd Series (ISSN 0556-2791), vol. 38, July 15, 1988, p. 678-682.

Physics

General Physics

27

Electron Impact, Molecular Excitation, Vibrational Spectra, Water, Angular Distribution, Cometary Atmospheres, Ground State, Ionization Cross Sections

Scientific paper

A crossed-beam technique was used to measure absolute differential cross sections for the vibrational excitation of water-vapor molecules. The energy and angular range were from 2.2 to 20 eV and from 30 to 150 deg. Vibrational-excitation cross sections were determined for the bending (010) and stretching (100 and 001) modes of the electronic ground state. It is shown that the integral cross sections are generally larger than those of Seng and Linder (1976) by 10-20 percent for both the bending and stretching modes. It is noted that the results obtained are of interest in connection with the theoretical modeling of cometary ionospheres.

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