%0 Conference Paper
%F Oral 
%T Vitreous Silica Distends in Helium Gas: Acoustic Versus Static Compressibilities
%+ Laboratoire Charles Coulomb (L2C)
%+ Institut de minéralogie et de physique des milieux condensés (IMPMC)
%A Weigel, Coralie
%A Polian, Alain
%A Kint, Mathieu
%A Ruffle, Benoit
%A Foret, Marie
%A Vacher, René
%< avec comité de lecture
%Z L2C:13-083
%B NCM12 (Non-Crystalline Materials 12)
%C Riva Del Garda, Italy
%8 2013-07-07
%D 2013
%Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
%Z Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]Conference papers
%X Sound velocities of vitreous silica are measured under He compression in the pressure range of 0-6 GPa by Brillouin light scattering. It is found that the well-known anomalous maximum in the pressure dependence of the compressibility is suppressed by He incorporation into the silica network. This shows that the elastic anomaly relates to the collapse of the largest interstitial voids in the structure. The huge difference between the static and the acoustic compressibilities indicates that the amount of incorporated helium still increases at 6 GPa.
%G English
%L hal-00814488
%U https://hal.science/hal-00814488
%~ UNIV-PARIS7
%~ UPMC
%~ CNRS
%~ IMPMC
%~ ALLINSP
%~ L2C
%~ UPMC_POLE_2
%~ MIPS
%~ UNIV-MONTPELLIER
%~ SORBONNE-UNIVERSITE
%~ SU-SCIENCES
%~ UNIV-PARIS
%~ ALLIANCE-SU
%~ UM-2015-2021