2004/07/19 by P. Benassi, Benassi, P., S. Caponi +15
Engineering · Materials Science · Physics and Astronomy · #Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #High voltage insulation and dielectric phenomena #Ultrasonics and Acoustic Wave Propagation #cond-mat.dis-nn
paper · pdf · doi:10.48550/arxiv.cond-mat/0407476
4 pages, 3 figures
arxiv created 2004/07/19 · openalex publication_date 2004/07/19 · arxiv updated 2009/12/01 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
We report Ultraviolet Brillouin light scattering experimental data on v-SiO2 in an unexplored frequency region, performed with a newly available spectrometer up to exchanged wavevector q values of 0.075 nm-1, as a function of temperature. The measured attenuation scales on visible data following a q2 behavior and is temperature-dependent. Such temperature dependence is found in a good agreement with that measured at lower q, suggesting that its origin is mainly due to a dynamic attenuation mechanism. The comparison between the present data with those obtained by Inelastic X-ray Scattering suggests the existence of a cross-over to a different attenuation regimes.