Hindrance in fusion heavy-ion reactions Original Research Article

The behavior of heavy ion fusion reactions at energies larger than the Coulomb barrier is discussed by analyzing the energy dependence of all reaction channels in 58Ni + 124Sn and 16O + 208Pb systems. The analysis is done by using a semiclassical models that incorporate surface and particle transfer degrees of freedom. The observed hindrance factor may be understood in term of deep-inelastic collisions whose cross section should be added to the one of fission and evaporation to obtain a meaningful comparison with the calculated capture cross section.