Author/Authors :
S. Heinz، نويسنده , , Juan V. Comas، نويسنده , , S. Hofmann and G. Münzenberg، نويسنده , , D. Ackermann، نويسنده , , Francisco J. Heredia، نويسنده , , F.P. Hessberger، نويسنده , , J. Khuyagbaatar، نويسنده , , B. Kindler، نويسنده , , B. Lommel، نويسنده , , R. Mann، نويسنده , , C. Golabek، نويسنده , , W. Mittig، نويسنده , , F. Rejmund، نويسنده , , A.C.C. Villari، نويسنده ,
Abstract :
We investigated di-nuclear system formation with successive nucleon transfer at beam energies at and below the barrier in the superheavy systems 6428Ni + 20782Pb (Zproj.+Ztarget=110) and 23892U + 23892U (Zproj.+Ztarget=184). In both collision systems we observed a massive transfer of nucleons correlated with the dissipation of the entire kinetic energy. The results are in accordance with the two-center shell model which assumes the formation of a di-nuclear system as first step to fusion. The experiments have been performed at the velocity filter SHIP (GSI) and at the VAMOS spectrometer (GANIL).
