1. CNRS, ISM, UMR5255, F-33400 Talence, France
2. Univ. Bordeaux, ISM, UMR5255, F-33400 Talence, France
3. Dynamical processes in Atomic and Molecular Systems (DynAMoS), Facultad de Física, Universidad de la Habana, San Lázaro y L, La Habana 10400, Cuba
4. Georg-August Universität Göttingen, Institut für Physikalische Chemie, Tammannstraße 6, 37077 Göttingen, Germany
5. Department of Dynamics at Surfaces, Max-Planck-Institute for Biophysical Chemistry, Am Faßberg 11, 37077 Göttingen, Germany