Details of the nuclear surface from3He scattering over a wide range

Abstract
The development of folding models to calculate optical potential for the 3He elastic scattering has shown that it is important to include exchange effects, saturation effects and second-order terms for a potential to accurately predict the cross sections. Scattering 3He beams at different energies probes different regions of the surface and emphasizes the limitations of such models. Using the measurement of 3He elastic scattering from 56Fe at 33, 53 and 83 MeV a double folding optical-model potential has been developed which includes a reformulation of the second-order effects. The sensitivity of 3He scattering to the detailed shape of the potential in the surface region is demonstrated.