itora, Lisbon, Portugal, 1984).
[19] G. Ciccotti, P. Turq, and F. Lantelme, Chem. Phys. 88,
333 (1984).
[20] J.-F. Dufrˆ eche, T. O. White, and J.-P. Hansen, Mol.
Phys.101, 1741 (2003).
[21] The average contact distance between a symmetric
dumbbell and an inﬁnite plane atβ = 0.