  The self-consistent Green's function method is applied to 16O using a
G-matrix and Vucom as effective interactions, both derived from the Argonne v18
potential. The present calculations are performed in a larger model space than
previously possible. The experimental single particle spectra obtained with the
G-matrix are essentially independent of the oscillator length of the basis. The
results shows that Vucom better reproduces spin-orbit splittings but tends to
overestimate the gap at the Fermi energy.
