Self-consistent calculations are performed in 16O with effective G matrices obtained from two different soft core interactions. The calculations possess the 'triple' self-consistency: (a) on the single particle basis, (b) on the single particle eigenvalues (Brueckner self-consistency), and (c) on the occupation probabilities. Two different procedures of calculating the latter are carried out, one involving a truncation of the unoccupied state space, one involving no truncation. The truncation effects are studied and shown to increase with the hardness of the interaction. A comparison is also made to calculations where the Brueckner self-consistency is satisfied only on the average. The total and single particle removal energies for both forces are quite satisfactory, the Pirès – Gogny – de Tourreil interaction performing slightly better than that of de Tourreil – Sprung. The charge radius is approximately 10% too small.
Second-order structural phase transitions, free energy curvature, and temperature-dependent anharmonic phonons in the self-consistent harmonic approximation: Theory and stochastic implementation