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Is the inhibition/enhancement of fusion due to breakup still a puzzle?

2003; Springer Science+Business Media; Volume: 33; Issue: 2 Linguagem: Inglês

10.1590/s0103-97332003000200031

1678-4448

A. Szanto de Toledo, M. G. Munhoz, J. Takahashi, F. A. Souza, E. E. Alonso, N. Carlin, R. Liguori Neto, M. M. de Moura, A. A. P. Suaide, E. M. Szanto,

Nuclear physics research studies

The effect of breakup in the fusion cross section in terms of suppression versus enhancement, discussed in a conflicting way in the literature, is addressed. Data and theoretical predictions available in the literature are compared. Excitation functions of the sub- and near-barrier fusion cross-sections for a wide variety of light and heavy systems are presented and interpreted. We have measured fusion excitation functions and breakup correlation functions for the medium weight systems 6Li + 59Co and 7Li + 59Co. These measurements help to establish the influence of the projectile breakup on the fusion process at near-barrier energies and contribute to the determination of how the mass of the target affects the breakup role. The results indicate a light fusion enhancement at sub-barrier energies and a geometry dominated cross section at barrier energies.