Author/Authors :
Baldi، نويسنده , , G. and Caponi، نويسنده , , S. and Comez، نويسنده , , L. and Di Fonzo، نويسنده , , S. and Fioretto، نويسنده , , D. and Fontana، نويسنده , , A. and Gessini، نويسنده , , A. and Masciovecchio، نويسنده , , C. and Montagna، نويسنده , , M. and Ruocco، نويسنده , , G. and Santucci، نويسنده , , S.C. and Viliani، نويسنده , , G.، نويسنده ,
Abstract :
New experimental data on vitreous silica, collected in a previously unexplored frequency region between 60 and 120 GHz, are reported. The Brillouin ultraviolet light scattering technique has been used to measure the dynamic structure factor for two exchanged momenta, Q = 0.078 and 0.11 nm−1. The experiment has been performed using the IUVS beam line at the Elettra Synchrotron radiation facility in Trieste. An evidence of a transition between two different dynamical regimes is discussed.
