1. Max-Planck-Institute for Extraterrestrial Physics, Giessenbachstrasse 1, D-85741 Garching, Germany
2. Frankfurt Institute for Advanced Studies, Johann Wolfgang Goethe Universität, Ruth-Moufang-Str 1, D-60438 Frankfurt am Main, Germany
3. Instituto de Ciencias Nucleares UNAM, C.U., Circuito Exterior S/N A.P. 70-543, 04510 Mexico D.F., Mexico
4. Excellence Cluster Universe, Technical University Munich, Giessenbachstrasse 1, D-85741 Garching, Germany
5. Goethe Universität, Max-von-Laue-Str 1, D-60438 Frankfurt am Main, Germany
6. GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, D-64291 Darmstadt, Germany