1. AMEC, Booths Park, Chelford Road, Knutsford, Cheshire WA16 8QZ, UK
2. Commissariat à l'Energie Atomique, CEA Cadarache, 13108 Saint Paul Les Durance, France
3. Paul Scherrer Institut, Villigen PSI, Villigen 5232, Switzerland
4. Joint Research Centre, Institute for Transuranic Elements (ITU), P.O. Box 2340, Karlsruhe 76125, Germany