GROUND-STATE PROPERTIES OF ³He ARROW UP AND D ARROW UP WITHIN THE METHOD OF CORRELATED BASIS FUNCTIONS.

Advanced integral-equation techniques, including Fermi hypernetted-chain resummation, are used to derive the properties of Jastrow variational models of the ground states of **3He ARROW UP , unpolarized **3He and two species of D ARROW UP . Results are reported for the energy as a function of density, for the liquid structure function and (in some cases) for the effective mass, magnetic susceptibility and pairing matrix elements. The results indicate that it will be necessary, particularly for unpolarized **3He, to go beyond the Jastrow model to achieve a quantitative microscopic account of these systems. Preliminary efforts toward the incorporation of momentum-dependent, spin-dependent and other non-Jastrow correlations by means of the method of correlated basis functions are described.