The properties of the type-c nucleon-exchange term in a resonating-group formulation that takes into account the clustering nature of the nuclei involved are investigated. The results indicate that these properties are weakly affected by the degree of clustering, and the one-exchange term makes the dominant contribution among all class-A exchange terms. The equivalent type-1c, or knockon, exchange potential is found to have a characteristic range shorter than the direct potential and a characteristic energy that has a large value around 50 MeV/nucleon.

• Received 19 December 1988

DOI:https://doi.org/10.1103/PhysRevC.39.1696