Calculated rotational and vibrational excitation rates for electron-HeH^+ collisions

Details Calculated rotational and vibrational excitation rates for electron-HeH^+ collisions Calculated rotational and vibrational excitation rates for electron-HeH^+ collisions

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.299..171r&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 299, Issue 1, pp. 171-175.

Astronomy and Astrophysics

Astronomy

10

Molecular Data, Molecular Processes

Scientific paper

Molecular R-matrix calculations are performed at a range of energies to give rotational and vibrational excitation and de-excitation cross-sections and, hence, rates for electron collisions with HeH^+ up to electron temperatures of 20000 K. Critical electron densities are also given. The rotational calculations include the Coulomb-Born completion of the cross-sections for high l values. Rates for the transition j=0-->2, which have previously been assumed to be negligible, are found to be up to half those for j=0-->1, raising the prospect of observing the HeH^+ j=2-->1 emission line at 74.8 mum.

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