1. European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex, France
2. Oak Ridge National Laboratory, P.O. Box 2008 MS-6375, Oak Ridge, Tennessee 37831-6375, USA
3. European Commission, Joint Research Centre, Institute for Transuranium Elements, Postfach 2340, D-76125 Karlsruhe, Germany
4. Institute for Experimental Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10/131, A-1040 Wien, Austria