Optical and Double Folding Model Analysis of 28Si(α,α)28Si Elastic Scattering from 12.7 to 240 MeV

In this paper the experimental data on the angular distribution of elastic scattering of a-particles on Si-28 target nucleus in the energy range from 12.7 to 240 MeV are analyzed using FRESCO code. The analysis in the framework of the optical model (OM) has been performed in two different potential sets. In the framework of the double-folding model (DFM), we created the real optical potential using a density dependent version of M3Y interactions (BDM3Y1) based on the G-matrix elements of the Paris nucleon-nucleon (NN) potential. The renormalization factor of folded potential N-r has been extracted and its energy dependence has been determined. Energy dependence of real (V) and imaginary (W) potential parts as well as total reaction cross-sections sigma(R) has been investigated. The (real and imaginary) potential volume integrals (J(V) and J(W)) as well as the chi(2) /N values have been obtained for the fourteen studied energies.