Microscopic Optical Potentials for Helium-6 Scattering off Protons
  The differential cross section and the analyzing power are calculated for elastic scattering of $^6$He from a proton target using a microscopic folding optical potential, in which the $^6$He nucleus is described in terms of a $^4$He-core with two additional neutrons in the valence p-shell. In contrast to previous work of that nature, all contributions from the interaction of the valence neutrons with the target protons are taken into account. 
Ch. Elster, A. Orazbayev, S. P. Weppner
nucl-th