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Ismanuel Rabadán Baljit K. Sarpal & Jonathan Tennyson 《Monthly notices of the Royal Astronomical Society》1998,299(1):171-175
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. 相似文献
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