Truncated series expansion for the correlation function of permanent and induced depolarised Rayleigh bands

Abstract

Correlation functions from depolarised Rayleigh bands of molecules with permanent and induced polarisability components are simulated using an expansion in terms of successive memory functions, truncated at an early stage with an exponential decay. The results of Alder et al. for computer argon and Dill et al. for acetone, methyl iodide and benzene up to several kbar of external pressure are simulated closely in the majority of cases, but only some of the oscillations in the experimental results for benzene and methyl iodine are reproduced by the very simple truncated series expansion used here.