Abstract
A previous semi-microscopic analysis based on the double folding model, for the α-particle elastic scattering on A ∼ 100 nuclei at energies below 32MeV, is enlarged for medium mass nuclei up to A ∼ 120 and energies below 50MeV. The energy-dependent phenomenological imaginary part for this semi-microscopic optical model potential (OMP) was obtained, making use also of the dispersive correction to the microscopic real potential. A regional OMP parameter set for low-energy α-particles has been obtained as well for nuclei within the above- mentioned mass range. It has been proved able to describe both scattering and α-particle induced reaction data, through the statistical model analysis of most accurate data of total α-reaction cross sections for 48 Ti and 51 V, and (α,n) reaction cross sections for the target nuclei 45 Sc, 46,48 Ti, 51 V, 50 Cr and 54 Fe and incident energies lower than 11-12MeV.
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