1. Department of Physics, Lund University, P.O. Box 118, S-22100 Lund, Sweden
2. Department of Theoretical Chemistry, Lund University, Chemical Center, P.O. Box 124, S-22100 Lund, Sweden
3. Department of Materials Science and Applied Mathematics, Malmö University, S-20506 Malmö, Sweden
4. MAX IV Laboratory, Lund University, P.O. Box 118, S-22100 Lund, Sweden
5. Department of Physics, Tampere University of Technology, P.O. Box 692, FIN-33101 Tampere, Finland
6. Department of Physics, University of Oulu, P.O. Box 3000, FIN-90014 Oulu, Finland
7. Department of Chemistry – BMC, Uppsala University, P.O. Box 576, S-75123 Uppsala, Sweden