CONSTRUCTION OF BASIS VIBRATION-SPECTRA OF MULTICOMPONENT SYSTEMS .3.AEROGEL

Capillary-hollow silica (aerogel) is regarded as a three-component sys tem consisting of the silica core, the hydroxyl component, and absorbe d water. Its spectra of the doubly amplitude-weighted density of vibra tion states (AWDS), recorded at 10 K using the inelastic neutron scatt ering, were decomposed into the spectra of the components of the syste m. The study uses the difference correlation technique based on the po stulated lack of correlation between the basis spectra. The decomposit ion has been made by constructing physically significant basis spectra satisfying the criterion of zero coefficient of linear correlation, f or the starting and modified samples of aerogel AG200.