1. Institut für Kernchemie, Universität Mainz, D-55099 Mainz, Germany
2. Department of Chemistry, University of Oslo, N-0315 Oslo, Norway
3. Paul Scherrer Institut, CH-5232 Villigen, Switzerland
4. Bhabha Atomic Research Center, Trombay, Bombay 400085, India
5. Department of Nuclear Chemistry, Chalmers University of Technology, S-41296 Göteborg, Sweden