FAR-INFRARED ATTENUATION IN GLASSES

The influence of quasilocal vibrations on the far-infrared spectra of glasses is investigated under the supposition that the quasilocal vibr ations are directly inactive in the attenuation. It is shown that taki ng into account phonon-quasilocal-vibration coupling and both medium- and short-range structure of the inhomogeneities of a photon-phonon co upling parameter can give rise to an attenuation curve similar to one observed for a-SiO2 and related materials.