Spin-orbit density part of the nucleus-nucleus interaction potential - art. no. 054619

We discuss the structural effects in the spin-orbit density part of the nuc leus-nucleus potential, calculated within the framework of the Skyrme energ y density formalism. The structural effects are analyzed by considering a t wo-nucleon transfer process in both the alpha and non-alpha colliding nucle i. We find that the spin-orbit density part of the nucleus-nucleus potentia l shows a preference for the alpha-nuclei transfers in the alpha multiplier (N = Z,A = 4n) colliding nuclei, which diminishes for the non-alpha multip lier nuclei. Such alpha-transfer effects are found to be related to the clo sure of the last j shell(s) of the product nucleus (nuclei), for both proto ns and neutrons. The interesting result is that this effect is shown to exi st both for the number of valence particles and the weighted number of vale nce particles, called particle strength. [S0556-2813(99)01311-4].