Electron-impact excitation of molecular ions

Details Electron-impact excitation of molecular ions Electron-impact excitation of molecular ions

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrva..40..633n&link_type=abstract

Physical Review A - General Physics, 3rd Series (ISSN 0556-2791), vol. 40, July 15, 1989, p. 633-637. Research supported by DOE.

Physics

General Physics

14

Electron Impact, Interstellar Matter, Molecular Excitation, Molecular Ions, Coulomb Collisions, Electron Density (Concentration), Ground State, Molecular Rotation, Molecular Excitation And Ionization By Electron Impact

Scientific paper

A simple expression is derived that relates the rate coefficient for dipole-allowed electron-impact excitation of a molecular ion in the Coulomb-Born approximation to the Einstein A coefficient for the corresponding radiative decay. Values of the rate coefficient for vibrational excitation of several molecular ions of astrophysical interest for which Einstein A coefficients are available are presented, and the radiative decay following vibrational excitation from a given rotational level of the ground vibrational state is discussed. The rotational distribution in the ground vibrational state is investigated, and a general analytic expression for the level populations is derived.

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