Abstract

The strong coupling between the real and imaginary terms in the optical potential for $^{16}\mathrm{O}$${+}^{60}$Ni, $^{208}\mathrm{Pb}$ previously reported for elastic scattering at bombarding energies close to the Coulomb barrier does not occur for the elastic scattering of $^{6}\mathrm{Li}$${+}^{28}$Si. This result confirms the suggestion of Mahaux, Ng\^o, and Satchler that the dispersion relation connecting the real and imaginary potential terms found for $^{16}\mathrm{O}$ scattering will not occur for weakly bound projectiles.

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