The purpose of the present Comment is twofold. First, we stress that the fusion cross section in region II of the critical distance model is not determined by the potential alone, but that dynamical effects (friction and deformation) play an essential role. Second, we point out that a proper single-folding potential accounts well for the fusion cross section in region I.

• Received 1 July 1988

DOI:https://doi.org/10.1103/PhysRevC.39.2085