000201688 001__ 201688 000201688 005__ 20240619092011.0 000201688 0247_ $$2doi$$a10.1103/PhysRevE.90.062319 000201688 0247_ $$2ISSN$$a1063-651X 000201688 0247_ $$2ISSN$$a1095-3787 000201688 0247_ $$2ISSN$$a1539-3755 000201688 0247_ $$2ISSN$$a1550-2376 000201688 0247_ $$2Handle$$a2128/8820 000201688 0247_ $$2WOS$$aWOS:000349308700002 000201688 0247_ $$2altmetric$$aaltmetric:2156483 000201688 037__ $$aFZJ-2015-03982 000201688 041__ $$aEnglish 000201688 082__ $$a530 000201688 1001_ $$0P:(DE-Juel1)130573$$aBuchenau, Ulrich$$b0$$eCorresponding Author$$ufzj 000201688 245__ $$aEvaluation of x-ray Brillouin scattering data 000201688 260__ $$aCollege Park, Md.$$bAPS$$c2014 000201688 264_1 $$2Crossref$$3online$$bAmerican Physical Society (APS)$$c2014-12-31 000201688 264_1 $$2Crossref$$3print$$bAmerican Physical Society (APS)$$c2014-12-01 000201688 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1434090571_12152 000201688 3367_ $$2DataCite$$aOutput Types/Journal article 000201688 3367_ $$00$$2EndNote$$aJournal Article 000201688 3367_ $$2BibTeX$$aARTICLE 000201688 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000201688 3367_ $$2DRIVER$$aarticle 000201688 520__ $$aMaking 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. 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