Astron. Astrophys. Suppl. Ser.
Volume 142, Number 3, March II 2000
|Page(s)||475 - 497|
|Published online||15 March 2000|
Rovibrational excitation of HD molecules by He atoms
UMR 8631, associée au CNRS et à l'Université Paris 7, et DAEC, Observatoire de Paris, F-92195 Meudon, France
Send offprint request to: E. Roueff
Accepted: 13 January 2000
Rate coefficients for rovibrational transitions induced in HD by collisions with He are presented. Full quantum mechanical treatment has been used with the interaction potential surface calculated by Muchnick & Russek (1994). The vibrational 0 quenching rates of HD due to various perturbers are compared up to temperatures of 1500 K. The influence of vibrationally excited channels on the pure rotational excitation cross sections is shown to be negligible.
Key words: atomic data / atomic processes
© European Southern Observatory (ESO), 2000