1. Department of Chemistry Purdue University West Lafayette IN 47907-2084 USA
2. Department of Molecular Physics Fritz Haber Institute of the Max Planck Society Faradayweg 4–6 Berlin Germany 14195
3. Department of Physical Chemistry Faculty of Science and Technology University of the Basque Country (UPV/EHU) B° Sarriena, S/N Leioa 48940 Spain
4. Instituto Biofisika (UPV/EHU-CSIC) University of the Basque Country (UPV/EHU) B° Sarriena S/N Leioa 48940 Spain
5. Fundación Biofísica Bizkaia/Biofisika Bizkaia Fundazioa (FBB) E-48940 Leioa Spain
6. Gas Phase Chemical Physics Livermore CA 94550 USA