We have evaluated the differential cross section for ${}^{11}\mathrm{Li}$ scattering from protons at 800 MeV/nucleon using the single-scattering approximation to Kerman-McManus-Thaler multiple-scattering expansion of the optical potential, and also the multiple-scattering expansion of the total T matrix. Using the same projectile density distributions and nucleon-nucleon transition amplitudes as inputs, we show that the two scattering frameworks produce significantly different elastic-scattering observables. We also show that the predictions from the two approaches differ because of core recoil and virtual breakup of the valence halo neutrons, which tend to produce opposite effects.

• Received 10 March 2000

DOI:https://doi.org/10.1103/PhysRevC.63.044003