1. Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, United States
2. Laboratoire de Physique des Lasers, Atomes
et Molécules, Université de Lille 1, 59655 Villeneuve d’Ascq Cedex, France
3. Department of Chemistry, University of Missouri−Kansas City, Kansas
City, Kansas 64110-2499, United States
4. Chemical Information Systems, Universität Ulm, D-89069, Ulm, Germany