The angular distribution for the breakup of 8B into 7Be+p on a 58Ni target
has been measured at an incident energy of 25.75 MeV. The data are inconsistent
with first-order theories but are remarkably well described by calculations
including higher-order effects. The comparison with theory illustrates the
importance of the exotic proton halo structure of 8B in accounting for the
observed breakup angular distribution.Comment: 4 pages, 3 figures, Phys. Rev. Letters (accepted). This is the
version that will appear in the journal article. It contains minor changes
and a new referenc
