The Momentum Distribution of Liquid $^3$He
  We present high-resolution neutron Compton scattering measurements of liquid $^3$He below its renormalized Fermi temperature. Theoretical predictions are in excellent agreement with the experimental data when instrumental resolution and final state effects are accounted for. Our results resolve the long-standing inconsistency between theoretical and experimental estimates of the average atomic kinetic energy. 
Matthew S. Bryan, Timothy R. Prisk, Richard T. Azuah, William G.   Stirling, Paul E. Sokol
cond-mat.other