Abstract
The microscopic theory that describes space and time dependent correlated motion of the liquid in terms of inter atomic potential and correlation function has been used to explain experimentally accurate coherent dynamical structure factor of liquid potassium near its melting point for various linear momentum transfers as measured by inelastic X- ray scattering with high resolution. In particular the computed spectra for low momentum transfers lying between 1.75 nm−1 and 10.0 nm−1, evaluated with the derived analytical form of potential, which is a superposition of a repulsive and long range oscillatory part, are in good agreement with the corresponding experimental results. Interplay of different characteristic times in the collective dynamics has been brought out.
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