1. Institute of Physical and Theoretical Chemistry, Technische Universität Braunschweig 1 , Gaußstraße 17, 38106 Braunschweig, Germany
2. CNRS, UMR 8523–PhLAM–Physique des Lasers Atomes et Molécules, Univ. Lille 2 , F-59000 Lille, France
3. Department of Chemistry, Rutgers University 3 , Newark, New Jersey 07102, USA
4. Centre of New Technologies, University of Warsaw 4 , S. Banacha 2c, 02-097 Warsaw, Poland