Consistent optical potential for incident and emitted low-energy α particles

Recent measurements of alpha-particle induced reactions on the Zn-64 nucleus, below and around the Coulomb barrier, are analyzed simultaneously with alpha-particle emission at similar energies in proton-induced reactions on Zn isotopes. All open reaction channels, particularly the. decay, are calculated using consistent input parameters. Additionally, we check a previous optical-model potential for alpha particles on nuclei within the mass number range 45 <= A <= 209 [Avrigeanu et al., Phys. Rev. C 90, 044612 (2014)] and prove its correctness in the outgoing channel at least for the present case involving Zn-64 and nearby nuclei. The reliability of this potential for incident as well as emitted low-energy alpha particles is supported by the successful reproduction of high-precision measured data, using no empirical rescaling factor of the gamma and/or particle widths.