Mayer f-function

The Mayer f-function, or f-bond is defined as:

$f_{12}=f(r_{12})=\exp \left(-{\frac {\Phi _{12}(r)}{k_{B}T}}\right)-1$

where

• $k_{B}$ is the Boltzmann constant.
• $T$ is the temperature.
• $\Phi _{12}(r)$ is the intermolecular pair potential.

Diagrammatically the Mayer f-function is written as

References

1. Joseph E. Mayer "Contribution to Statistical Mechanics", Journal of Chemical Physics 10 pp. 629-643 (1942)