1. European Commission,
Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, D-76125 Karlsruhe, Germany
2. CINVESTAV, Unidad Saltillo Carretera Saltillo-Monterrey,
Km 13.5, Ramos Arizpe 25900, Coahuila, México
3. University of Cambridge, Cambridge CB2 1TN, United Kingdom
4. Institut für Nukleare Entsorgung (INE),
P.O. Box 3640, D-76021 Karlsruhe, Germany