COMPARISON BETWEEN NUCLEAR-MATTER CALCULATIONS IN THE BRUECKNER AND CORRELATED BASIS FUNCTIONS APPROACHES

The results recently obtained by Kürten, Ristig and Clark in the framework of the correlated basis functions approach to nuclear matter are compared with those derived from two versions of the Brueckner-Hartree-Fock and of the renormalized Brueckner-Hartree-Fock approximations. We consider two nucleon-nucleon potentials, namely the GT 5200 interaction, and the Hamada-Johnston potential stripped of its spin-orbit and quadratic spin-orbit components. We study the practical importance of the latter omission, which is imposed in all available variational calculations. In addition to the average binding energy per nucleon, we compare the momentum average of the correlation function in the Brueckner-Hartree-Fock approximation with the non-central correlation functions determined by Kürten, Ristig and Clark. We also investigate the single-particle energies which appear in the two approaches. © 1979.