  We compute the spectral density in the normal phase of an interacting
homogenous Fermi gas using a T-matrix approximation. We fit the quasiparticle
peaks of the spectral density to BCS-like dispersion relations, and extract
estimates of a "pseudo-gap" energy scale and an effective Fermi-wavevector as a
function of interaction strength. We find that the effective Fermi-wavevector
of the quasiparticles vanishes when the inverse scattering length exceeds some
positive threshold. We also find that near unitarity the quasiparticle
lifetimes, estimated from the widths of the peaks in the spectral density,
approach values on the order of the inverse Fermi-energy. These results are
consistent with the "breakdown of Fermi liquid theory" observed in recent
experiments.
