1. Laboratoire de Physique des
Lasers, Atomes et Molécules, Université de Lille I, 59655 Villeneuve d’Ascq Cedex, France
2. Department of Chemistry and
Biochemistry, Oberlin College, Oberlin,
Ohio 44074, United States
3. Kent State University, Kent, Ohio 44242,
United States
4. Department
of Chemistry, University of Ulm, D-89069
Ulm, Germany