Exchange effects in nucleus-nucleus interaction

The effects of antisymmetrization, represented by various nucleon-exchange terms in a resonating-group formulation, are studied in the case of nucleus-nucleus scattering. By examining the features of the effective local potentials which are constructed to yield the same Born scattering amplitudes as these exchange terms, it is found that the one-exchange and the core-exchange terms are the most important. In addition, this study shows that in scattering systems the one-exchange term has generally a substantial influence over a wide range of energies. On the other hand, the core-exchange term is important only when the nucleon-number difference of the interacting nuclei is rather small. Based on the results of this investigation, it can also be concluded that if a local-potential model is employed to phenomenologically analyze experimental scattering results, then the effective potential in this model may need to have an odd-even $l$-dependent character.