Abstract
Breakup cross sections of ${}^{8}\mathrm{B}$ are analyzed in a two-body structure model, with an inert ${}^{7}\mathrm{Be}$ core and a loosely bound valence proton. The nuclear induced breakup is calculated in an eikonal approximation, and Coulomb dissociation is calculated to first order. There is a strong correlation within this model between the total $E1$ strength and the one-proton removal cross section ${\ensuremath{\sigma}}_{1p}.$ Thus we find that the measured values of ${\ensuremath{\sigma}}_{1p}$ for a carbon target are consistent with the $E1$ strength extracted in recent Coulomb dissociation experiments. The predicted ${\ensuremath{\sigma}}_{1p}$ values on high-$Z$ targets are significantly larger than measured. We discuss how this discrepancy can be reduced by improving the description of Coulomb dissociation.
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