
306 Perturbation Theories for Fluids and Solids
chosen as the central site, and the last term is the contribution from two different sites.
Baus and Colot (1986) used the PY approximation for the DCF of the reference fluid
and the Bennett (1972) simulation data for the site–site correlation function g
B
(|R|)
of the glass at random close packing. The site–site pair correlation function of the
glass was obtained by scaling as g(|R|) = g
B
[(η/η
RCP
)
1/3
R], with the random close
packing density considered as an adjustable parameter. They found that the glass is
mechanically stable for η 0.56 and is thermodynamically stable with respect to the
fluid for