  A low-momentum nucleon-nucleon (NN) potential V-low-k is derived from modern
realistic NN potentials by integrating out the high-momentum modes. The smooth
V-low-k may be used as input for nuclear structure calculations instead of the
usual Brueckner G matrix. Such an approach eliminates the energy dependence one
finds in the G-matrix approach, allowing this interaction to be used directly
in Hartree-Fock calculations. Bulk properties of 16O have been calculated
starting from different NN potentials. Our results, obtained including up to
second order contributions in the Goldstone expansion, are in good agreement
with experiment.
