1. European Commission, Joint Research Centre Postfach 2340 76125 Karlsruhe Germany
2. Institut für Nukleare EntsorgungForschungszentrum Karlsruhe Postfach 3640 76021 Karlsruhe Germany
3. Department of ChemistryUniversity of Copenhagen Universitetsparken 5 2100 Copenhagen Denmark
4. Department of Chemistry “Ugo Schiff” and INSTM Research UnitUniversity of Florence Via della Lastruccia 3 50019 Sesto Fiorentino Italy