1. Ion Cyclotron Resonance Program,
National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee,
Florida 32310-4005, United States
2. Department of Molecular Biosciences, Northwestern University, 2205 Tech Drive, Evanston,
Illinois 60208-3500, United States
3. Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee,
Florida 32306-4390, United States