A Common Optical Potential for ⁴He+¹²C at Intermediate Energies

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