1. European Commission, Joint Research Centre, Institute for Transuranium Elements, Postfach 2340, D-76125, Karlsruhe, Germany.
2. Oak Ridge National Laboratory (ORNL), Chemical Sciences Division, Office Box 2008, MS-6375, Oak Ridge, TN 37831, USA.
3. European Synchrotron Radiation Facility (ESRF), Boîte Postale 220, F-38043 Grenoble, France.
4. Vienna University of Technology, Institute for Solid State Physics, Wiedner Hauptstrasse 8-10/138, A-1040, Vienna, Austria.
5. Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala, Sweden.