A molecular dynamics study of liquid cesium along vapour pressure curve

Molecular dynamic simulation of liquid cesium along its vapour pressure curve has been done using Ichimaru-Utsumi potential. This potential have been compared with PST and DRT potential near the triple point. We have studied static pair correlation function, time evolution of velocity auto-correlation function, and self diffusion coefficients for four thermodynamic states. It is found that the position of first peak in pair correlation function almost remains same whereas its peak height decreases as temperature is increased. The calculated values of the self-diffusion coefficient have been compared with experimental result wherever available. Using the MD values of reduced diffusion coefficients for expanded Rb and present results for expanded Cs, it is predicted that both data can be represented by a single straight line as a function of reduced density and temperature.