Bärwinkel, Klaus; Schnack, Jürgen - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 18, pp. 4581-4588
The van-der-Waals version of the second virial coefficient is not far from being exact if the model parameters are appropriately chosen. It is shown how the van-der-Waals resemblance originates from the interplay of thermal averaging and superposition of scattering phase shift contributions. The...