THEORETICAL INVESTIGATIONS OF THE DYNAMIC PROPERTIES OF LIQUID CESIUM NEAR THE MELTING-POINT

We present results for the dynamic properties of liquid caesium obtained by means of a molecular-dynamics study. The thermodynamic state corresponds exactly to the system studied recently in experiment, i.e. the temperature is 308 K and the density is 1.8321 g cm-3. The theoretical calculations reproduce a positive dispersion relation detected in experiment; however, evidence for propagating sound modes beyond the first peak in S(q) may not be found within the framework of a memory function analysis of the theoretical data. Different thermodynamic quantities extracted from the calculations are in good agreement with experimental data.