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.
Brillouin ultraviolet light scattering on vitreous silica / Baldi, Giacomo; Caponi, Silvia; Comez, L.; Di Fonzo, S.; Fioretto, D.; Fontana, Aldo; Gessini, A.; Masciovecchio, C.; Montagna, Maurizio; Ruocco, G.; Santucci, S. C.; Viliani, Gabriele. - In: JOURNAL OF NON-CRYSTALLINE SOLIDS. - ISSN 0022-3093. - STAMPA. - 351:21-23(2005), pp. 1919-1923. [10.1016/j.jnoncrysol.2005.04.038]
Brillouin ultraviolet light scattering on vitreous silica
Baldi, Giacomo;Caponi, Silvia;Fontana, Aldo;Montagna, Maurizio;Viliani, Gabriele
2005-01-01
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.| File | Dimensione | Formato | |
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