Coupled-Channels Analysis and Optical Model Potential Extraction for Deuteron Scattering From 6Li to 208Pb

Deuteron-nucleus elastic and inelastic scattering from 6Li to 208Pb has been studied for incident energies ranging from 9.9 to 270 MeV. The main goal of this work is to study the effect of coupling the nuclear ground state to inelastic excitation channels on the energy dependence of optical model potential (OMP) parameters. Using the FRESCO and SFRESCO codes, we explicitly coupled the elastic channel to low-lying collective states and extracted OMP parameters through χ2 minimization. The best-fit optical model parameters were obtained for elastic and inelastic angular distribution data. Our elastic and inelastic angular distribution fits show excellent agreement with the experimental data since more than one set of potential parameters can reproduce a given angular distribution data. When the ground state was coupled to the most important inelastic excitation channels the energy dependence of the OMP parameters was reduced. This is most obvious for optical model parameters whose value became almost constant when channel coupling was considered.