1. Department of Chemistry
and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
2. Department of Chemistry, Missouri State University, Springfield,
Missouri 65897, United States
3. Institut fur Ionenphysik und Angewandte
Physik, Universität Innsbruck, Technikerstraße
25/3, A-6020 Innsbruck, Austria