title: Rotational excitation of water by hydrogen molecules: comparison of results from classical and quantum mechanics.
abstract: Quasiclassical trajectory calculations are carried out for rotational excitation of water by hydrogen molecules. State-to-state rate coefficients are determined at 100 K and are compared to available quantum results. A good agreement between classical and quantum rates is observed for downward transitions, with an average accuracy of classical results better than a factor of 2. It is thus found that the ambiguities described by Faure and Wiesenfeld [J. Chem. Phys. 121, 6771 (2004)] can be solved in the particular case of waterlike asymmetric-top molecules.
authors.affiliation: Laboratoire d'Astrophysique, UMR 5571 CNRS, Université Joseph-Fourier, BP 53, 38041 Grenoble Cedex 09, France. Alexandre.Faure@obs.ujf-grenoble.fr
authors.forename: Alexandre
authors.initials: A
authors.lastname: Faure
authors.forename: Laurent
authors.initials: L
authors.lastname: Wiesenfeld
authors.forename: Michael
authors.initials: M
authors.lastname: Wernli
authors.forename: Pierre
authors.initials: P
authors.lastname: Valiron