1. GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
2. Institute of Problems of Chemical Physics, Russian Academy of Sciences, Institutskii pr. 18, 142432 Chernogolovka, Russia
3. E.T.S.I. Industriales, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
4. Tomsk University, Lenin Ave. 36, 634050 Tomsk, Russia; Lomonosov Moscow State University, GSP-1, Leninskie Gory, 119991 Moscow, Russia; and Moscow Institute of Physics and Technology, Institutskiy Per. 9, 141701 Dolgoprudny, Russia