New data were analyzed for the hard-sphere fluid at densities rs3 = 0.95-1.08 in the metastable range. In this region, the diffusion coeff. behaves as in lab. fluids, following a Doolittle equation with normal parameters rather than a Batchinski-Hildebrand equation. The diffusing, internally equilibrated, metastable fluid can be arrested at different densities by sudden quenching to obtain the glassy state. A new high-d. limit was identified for random close packing, 3% greater than that of Bernal packing.
Woodcock, L. V., & Angell, C. A. (1981). Diffusivity of the hard-sphere model in the region of fluid metastability. Physical Review Letters, 47(16), 1129–1132. https://doi.org/10.1103/PhysRevLett.47.1129