Calculated rotational and vibrational excitation rates for electron—HeH+ collisions

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 20 000 K. Critical electron densities are also given. The rotational...

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Veröffentlicht in:	Monthly notices of the Royal Astronomical Society 1998-09, Vol.299 (1), p.171-175
Hauptverfasser:	Rabadán, Ismanuel, Sarpal, Baljit K., Tennyson, Jonathan
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Sprache:	eng
Schlagworte:	molecular data molecular processes
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description	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 20 000 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 μm.
doi_str_mv	10.1046/j.1365-8711.1998.01741.x
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subjects	molecular data molecular processes
title	Calculated rotational and vibrational excitation rates for electron—HeH+ collisions
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