TY  - JOUR
AU  - Buchenau, Ulrich
TI  - Evaluation of x-ray Brillouin scattering data
JO  - Physical review / E
VL  - 90
IS  - 6
SN  - 1539-3755
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2015-03982
SP  - 062319
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000349308700002
DO  - DOI:10.1103/PhysRevE.90.062319
UR  - https://juser.fz-juelich.de/record/201688
ER  -