Near barrier fusion excitation function of ⁶Li + ²⁰⁸Pb

The fusion cross sections of ⁶Li+²⁰⁸ Pb system at energies near the barrier have been measured by means of the evaporation residue method and have been calculated in terms of the coupled-channels model, taking into account single and double phonon octupole excitations of ²⁰⁸Pb and the 3⁺ rotational state of ⁶Li. By comparing the experimental results with the theoretical calculations and with the fusion cross section of ¹⁶O+²⁰⁸Pb, in which no breakup happens, we conclude that the fusion cross sections of ⁶Li+²⁰⁸Pb are suppressed at above-barrier energies due to the effects of ⁶Li breakup, but below the barrier, the effects of breakup are not clear.