1. Biophysics Department, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1 64291 Darmstadt, Germany
2. Chemistry Department and NIS-INSTM, University of Turin, Via Pietro Giuria 7 10125 Torino, Italy
3. Thales Alenia Space Italia, Strada Antica di Collegno 253 10146 Torino, Italy
4. RHEA System, Jonckerweg 18 2201 DZ Noordwijk, Netherlands