Global density-dependent -nucleon interaction for -nucleus elastic scattering

We provide a global density-dependent 4He-nucleon (DD-alpha N) interaction to construct the alpha-nucleus optical model potential (OMP) across a wide range of incident energies. The global parametrization for the DD-alpha N interaction is obtained based on the proton-4He OMP, which reproduces the elastic scattering cross-section data very well in the incident energies of 12.04-500 MeV per nucleon. Using the present DD-alpha N interaction, we derive the alpha-nucleus potential by a folding procedure with the point-nucleon density obtained by a microscopic mean-field model. The density dependence of the DD-alpha N interaction is fixed phenomenologically to reproduce the alpha-nucleus elastic scattering cross-section data obtained from 16O, 40Ca, 58Ni, 90Zr, and 208Pb targets at E/A = 10-342.5 MeV. We also show the total reaction cross sections, which are helpful in fixing one free parameter, the renormalization factor for the imaginary part of the alpha-nucleus potential. Lastly, we show some examples, which clearly demonstrate the validity and power of the present DD-alpha N approach.