Sub-barrier fusion of 11Li with 208Pb

We have extended our previous measurements of the complete fusion and breakup fusion processes in the interaction of 11Li with spherical 208Pb with four new measurements at laboratory frame energies of 11Li of 26.1 to 32.7 MeV in the sub-barrier region. (Previous measurements were for \(E_{lab} = 28.6\) to 39.9 MeV.) Comparison of the complete fusion cross sections with coupled channel, TDHF and other models for these collisions reveals significant differences between the measured and calculated values. The implications of this finding for the fusion/breakup of halo nuclei are discussed.