Microscopic optical potentials for ${}^4$He scattering

Abstract

We present a reliable double-folding (DF) model for ${}^4$He-nucleus scattering, using the Melbourne $g$-matrix nucleon-nucleon interaction that explains nucleon-nucleus scattering with no adjustable parameter. In the DF model, only the target density is taken as the local density in the Melbourne $g$-matrix. For ${}^4$He elastic scattering from ${}^{58}$Ni and ${}^{208}$Pb targets in a wide range of incident energies from 20~MeV/nucleon to 200~MeV/nucleon, the DF model with the target-density approximation (TDA) yields much better agreement with the experimental data than the usual DF model with the frozen-density approximation in which the sum of projectile and target densities is taken as the local density. We also discuss the relation between the DF model with the TDA and the conventional folding model in which the nucleon-nucleus potential is folded with the ${}^4$He density.

8 pages, 7 figures

References in corpus (6)

• Nuclear rainbow scattering and nucleus-nucleus potential
• The continuum discretized coupled-channels method and its applications
• The intruder feature of 31Mg and the coexistence of many particle and many hole states
• Repulsive nature of optical potentials for high-energy heavy-ion scattering
• Missing monopole strength of the Hoyle state in the inelastic $\alpha$+${}^{12}$C scattering
• No-recoil approximation to knock-on exchange potential in the double folding model for heavy-ion collisions