%0 Journal Article
%A Buchenau, Ulrich
%T Evaluation of x-ray Brillouin scattering data
%J Physical review / E
%V 90
%N 6
%@ 1539-3755
%C College Park, Md.
%I APS
%M FZJ-2015-03982
%P 062319
%D 2014
%X Making use of the classical second-moment sum rule, it is possible to convert a series of constant-Q x-ray Brillouin scattering scans (Q momentum transfer) into a series of constant frequency scans over the measured Q range. The method is applied to literature results for the longitudinal phonon dispersion in several glass formers. The constant frequency scans are well fitted in terms of a Q-independent phonon damping depending exclusively on the frequency, in agreement with two recent theories of the boson peak. The method allows us to link the x-ray Brillouin scattering to the diffuse Umklapp scattering from the boson peak vibrations at higher momentum transfer on an absolute intensity scale.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000349308700002
%R 10.1103/PhysRevE.90.062319
%U https://juser.fz-juelich.de/record/201688