A common optical potential for ⁴He + ¹²C at intermediate energies

A common optical potential for ⁴He + ¹²C at intermediate bombarding energies, which is essential in analyzing exotic nuclei with ⁴He clusters, is obtained based on the São Paulo potential. Among systematic optical potentials for ⁴He + ¹²C, this potential has the merit of using a fixed imaginary part of the Woods-Saxon form. By optical-model calculations, this potential reproduces the experimental elastic scattering angular distributions of ⁴He + ¹²C well within the energy range of 26A-60A MeV. It is also applied successfully in calculations of the breakup reactions of ⁶Li + ¹²C and ⁶He + ¹²C with a three-body continuum discretized coupled-channel method. (authors)