New results in the analysis of 16O+28Si elastic scattering by modifying the optical potential -: art. no. 024610

The elastic scattering of the O-16+Si-28 system has been analyzed with a modified potential within the framework of the optical model over a wide energy range in the laboratory system from 29.0 to 142.5 MeV. This system has been extensively studied over the years and a number of serious problems has remained unsolved: The explanation of the anomalous large angle scattering data; the out-of-phase problem between theoretical predictions and experimental data; the reproduction of the oscillatory structure near the Coulomb barrier; and the consistent description of angular distributions together with the excitation functions data. These are just some of the problems. We propose the use of a modified potential method to explain these problems over this wide energy range. This new method consistently improves the agreement with the experimental data and achieves a major improvement on all the previous optical model calculations for this system.