Investigations on the Structure of Liquid Na-Cs Alloys

The structure of liquid sodium-caesium alloys has been investigated for a large number of compositions covering the whole concentration range. X-ray as well as neutron diffraction techniques were employed. Special attention has been paid to the small-angle region of the diffraction pattern. The long-wavelength limit of the structure factor has been interpreted by applying a model proposed earlier. Appreciable concentration fluctuations, indicating a tendency to phase separation, occur in the liquid. The size of the clusters was estimated using Guinier's model. For a few concentrations, molecular dynamics computer simulations have been carried out. Different models for evaluating the three partial structure factors have been considered