
122 Perturbation Theories for Fluids and Solids
where G
0
(t) and G
1
(t), the Laplace transforms of xg
0
(x) and xg
1
(x), respectively, are
G
0
(
t
)
=
L
(
t
)
e
−t
(
1 −η
)
2
Q
0
(
t
)
t
2
, (5.78)
G
1
(
t
)
=
Ke
−t
Q
0
(
t
)
Q
0
(
z
)(
t + z
)
, (5.79)
with
Q
0
(
t
)
=
S
(
t
)
+12ηL
(
t
)
e
−t
(
1 −η
)
2
t
3
, (5.80)
and a similar expression for Q(z) by replacing t with z. In the latter expression S(t)
and L(t) are given by Equations. 5.25 and 5.26, respectively.
The parameters K and z of the Yukawa tail were determined by the Henderson
and Blum (1976) procedure based on the expression of the RDF at contact and the
compressibility equation in the form of Equation 4.7. To this end, Tang and Lu
considered the CS EOS for