Low-Momentum Nucleon-Nucleon Potential and Nuclear Structure Calculations

A new approach for deriving the shell-model effective interaction from the free nucleon-nucleon (NN) potential is discussed. It consists in renormalizing the strong repulsive core contained in all modern NN potentials by constructing a low-momentum potential, V_low-k, which is confined within a certain cutoff momentum Λ. Results of shell-model calculations performed within the framework of the V_low-k approach are compared with those obtained by using the usual G-matrix formalism and with experimental data. We also present some results of preliminary calculations with different modern NN potentials and discuss the choice of the cutoff momentum.