1. Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, Prague, Czech Republic
2. Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, Prague, Czech Republic
3. Department of Inorganic Chemistry, University of Chemistry and Technology, Technická 5, 166 28, Prague 6, Czech Republic
4. Masaryk Secondary School of Chemistry, Křemencova 179/12, 116 28, Prague, Czech Republic
5. Institute of Solid State Physics, University of Latvia, 8 Kengaraga, LV-1063 Riga, Latvia
6. MAX IV Laboratory, Lund University, P.O. Box 118, SE-22100 Lund, Sweden