1. Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden Rossendorf, Bautzner Landstrasse 400, D-01328 Dresden, Germany
2. Technische Universität Dresden, D-01062 Dresden, Germany
3. Institute of Physics, Polish Academy of Sciences, al. Lotników
32/46, PL-02 668 Warszawa, Poland
4. Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany
5. Dutch-Belgian Beamline (DUBBLE), ESRF - The European Synchrotron, CS 40220, 38043 Grenoble, France