Two recent papers have given optical potential descriptions for the elastic scattering of the ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$+${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$ system at energies near the Coulomb barrier, both of which manifest partial-wave resonances. Our comment is that there is at least one other potential that reproduces the measurements but which does not result in such resonances.

• Received 13 March 1984

DOI:https://doi.org/10.1103/PhysRevC.30.403