1. CEA/DIF/DPTA/SPN, BP 12, 91680 Bruyères le Châtel, France
2. GANIL, BP 55027, 14076 Caen Cedex 5, France
3. The Weissman Institute, Rehovot, Isarel
4. IKS, KULeuven, Celestijnenlaan 200 D, 3001 Leuven, Belgium
5. FLNR-JINR, Dubna, Russia
6. Faculty of Physics, St. Kliment Ohridski University of Sofia, 1164 Sofia, Bulgaria
7. IFD, Warsaw University, Hoża 69, 00681 Warsaw, Poland