Impact of core excitations in break-up reactions with halo nuclei

Abstract

We revisit the resonant break-up of 19C on protons at intermediate energies. In this reaction, it was found, for the first time in a halo nucleus to our knowledge, that the cross section was largely dominated by the excitation of the core. In this contribution, we study the robustness of this conclusion against the choice of different optical potentials for the core.