Phenomenological and semi-microscopic analysis for 16O and 12C elastically scattering on the nucleus of 16O and 12C at Energies near the Coulomb barrier

The nuclear burning process proceeds from the conservation of the most abundant element hydrogen to helium, then from helium to carbon and oxygen, and then from these to heavier elements. Some of the key reactions for the carbon and oxygen burning stages of the nucleosynthesis are C-12+C-12 and O-16+O-16 leading to all possible final states. This paper contains the experimental measurements of C-12+C-12 and O-16+O-16 angular distributions performed at the cyclotron DC-60 in Astana, Kazakhstan. The extracted beam of O-16 and C-12 was accelerated up to two energies 1.75 and 1.5 MeV/n and then directed to an Al2O3 target of thickness 20 mu g/cm(2), and a carbon self-supporting target of thickness 17.4 mu g/cm(2). The angular distribution calculations were performed using both the phenomenological optical potential (SPI-GENOA) code and the double folding potential (FRESCO) code.