1. Insitute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen, Pf. 51, Hungary-4001, Hungary
2. Yukawa Insitute for Theoretical Physics, Kyoto University, Kitashirakawa Oiwake-Cho, 606-8502 Kyoto, Japan
3. GANIL CEA/DSM-CNRS/IN2P3, BP 5027 F-14076 Caen Cedex 05, France
4. Universidad Autonoma de la Ciudad de Mexico, Prolongacion San Isidro 151, Col. San Lorenzo Tezonco, Del Iztapalapa, Mexico City, 09790 D. F., Mexico
5. Institute de Ciencias Nucleares, Universidad National Autonoma de Mexico, A.P. 70-543, Mexico City, 04510 D. F., Mexico