The Raman coupling function in disordered solids: a light and neutron   scattering study on glasses of different fragility
  We report new inelastic Raman and neutron scattering spectra for glasses with different degrees of fragility; the data are compared for each sample to obtain the Raman coupling function $C(\omega)$. The study indicates a general linear behaviour of the $C(\omega)$ near the Boson peak maximum, and evidence a correlation between vibrational and relaxational properties, already observed in recent publications. 
A. Fontana, F. Rossi, G. Viliani, S. Caponi, and E. Fabiani