Abstract
A generalization of the viscoelastic model to binary systems has been applied to analyze inelastic X-ray scattering spectra from a He0.8Ne0.2 mixture. Experiments have been carried out at temperature T = 82 K and number density n = 18.5 nm−3. In order to test the reliability of such a generalization, we measured a few representative spectra. The model exhaustively describes the experimental data and provides a determination of the spectral densities of the separate mixture components as well as those of both density and concentration fluctuations. These results can be considered as a first test for further developments.
Acknowledgements
We would like to thank R. Cucini, F. D'Amico and R. Verbeni.