1. Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102A, HR-10000 Zagreb, Croatia
2. Institut für Nukleare Entsorgung, Karlsruher Institut für Technologie, P.O.
Box 3640, 76021 Karlsruhe, Germany
3. Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 37005 České Budějovice, Czech Republic