1. Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstraße 400, 01328 Dresden, Germany
2. Technische Universität Dresden, 01062 Dresden, Germany
3. School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom
4. Helmholtz-Zentrum Dresden-Rossendorf, Dresden High Magnetic Field Laboratory, Bautzner Landstraße 400, 01328 Dresden, Germany