Complete fusion of $^6$Li with $^{28}$Si and $^{64}$Ni nuclei in the framework of the continuum discretized coupled channel method

The complete fusion of $^6$Li with $^{28}$Si and $^{64}$Ni nuclei, ranging from subbarrier energies up to values well above the Coulomb barrier, is studied using the continuum discretized coupled channels method. We investigate the sensitivity of the results to the largest energy used in the discretization of the continuum, including closed channels. Our results reveal that, as long as the states in the continuum are not limited to too small energies, the specific upper bound adopted is not relevant as the complete fusion cross-section is fairly insensitive to it above a threshold. Convergence with respect to this parameter is rapidly reached, so that closed channels play a role only at low collision energies. A good agreement with the available experimental data is obtained.