Effective Interaction inα-Nucleus Scattering

Elastic $\alpha$-nucleus differential cross-section data (15°-175°) are analyzed using a potential model. The real potential is calculated using an effective potential obtained from a global analysis of nucleon-$\alpha$ data. The resulting four-parameter model given an excellent representation of the $\alpha$-nucleus data. This representation is significantly better than can be obtained with a six-parameter optical model and is sensitive to the nuclear-nucleon density distribution.