Double Folding Analysis of the +28si Elastic Scattering System

Using the double folding model (DFM), we reanalyzed 20 sets of experimental angular distributions for the elastic scattering alpha+Si-28 system in a wide energy range of alpha-particles from 12.7MeV to 240MeV. We used three effective nucleon-nucleon (NN) interactions that are CDM3Y6, Sao Paulo Potential (SPP2), and Brazilian Nuclear Potential (BNP) to generate the DF potentials. The data analysis was performed using semi-microscopic (SM) and fully microscopic (FM) methods. In the SM approach, the real part of the optical potential (OP) is created with the DFM, and the Woods-Saxon (WS) potential is considered for the imaginary part of the OP. In the FM approach, the DF potential renormalization factors N-R and N-I for the real and imaginary parts of the OP were extracted. We investigated the energy dependencies of the N-R and N-I factors, as well as of nuclear potential volume integrals and reaction cross-sections. We reasonably reproduced the data using NR and NI factors obtained from their energy-dependent functions.