Folded-diagram effective interactions with the Bonn meson-exchange potential model

A modern version of the Bonn One-Boson-Exchange potential has been used in a folded diagram expansion of the effective interation appropriate for sd - shell nuclei. Two different techniques for the summation of the folded diagrams have been studied, including all one-body and two-body valence-linked diagrams through third order, and using both a harmonic-oscillator (HO) basis and a Brueckner-Hartree-Fock (BHF) basis. The folded-diagram expanision of Kuo and co-workers shows a slow convergence when the HO choice is made, whereas the vertex renormalization procedure of Lee and Suzuki results in a rapidly converging expanision for the effective interaction. The convergence is very good for both iteration techniques when the self-consistent BHS basis is used. 31 refs., 12 figs., 7 tabs