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Recent high-precision measurements α-particle elastic scattering and  (α,x) reaction cross sections has motivated the extension of a previous  semi-microscopic analysis for the mass-region 50<A<120 and  energies from 13 to 50 MeV to heavy nuclei up to 209Bi. The regional optical model  potential for low-energy α-particles which has thus been obtained  entirely on the basis of elastic-scattering data analysis, for the nuclei within the  above-mentioned mass and energy ranges, is involved within the (α,γ),  (α,n) and (α,p) reaction cross sections analysis at  incident energies below the Coulomb barrier. The statistical-model parameters used for the  cross section calculations were established by analyzing various independent experimental  data for the involved nuclei, making possible the focus on the uncertainties of  α-particle OMP. An optical potential which describe equally well both  the low energy elastic-scattering and induced-reaction data of  α-particles has finally been obtained for medium and heavy mass  nuclei

α-particles optical potential for medium and heavy-mass nuclei around the Coulomb barrier