[1] Inst. de Physique Nucléaire, 91406 Orsay Cedex, France
[2] Grand Accelerateur Natl. Ions L., B.P. 5027, 14076 Caen Cedex, France
[3] Institute of Atomic Physics, P.O. Box MG6, Bucarest, Romania
[4] Flerov Lab. of Nuclear Reactions, Joint Institute for Nuclear Research, 141980, Dubna, Russia
[5] Lab. de Physique Corpusculaire, 14050 Caen Cedex, France
[6] Ctr. Spectrometrie Nucl. S., 91406 Orsay Cedex, France
[7] DAM BIII, SPTN, CE Bruyeres-le-Chatel, B.P. 12, 91680 Bruyeres-Le-Chatel, France
[8] Nuclear Physics Institute, 25068 Rez, Czech Republic