Interaction of Acoustic and Quasi-Elastic Modes in Liquid Water on Nanometer Length Scales
نویسندگان
چکیده
We investigate the presence of an acoustic-quasi-elastic interaction contribution in IXS spectra liquid water at 301K using inelastic x-ray scattering with sub-meV energy resolution momentum transfers 0.77<=Q<=4.20 /nm. The appears due to overlap acoustic mode tail quasi-elastic and is fully consistent hydrodynamic theory. Incorporating this allows us describe dynamic structure factor, S(Q,w), without introducing extra mode, may help explain earlier contradictory interpretations. sound velocity, relative intensity plateau for Q>2/nm values a viscoelastic generalization Landau-Placzek relation.
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ژورنال
عنوان ژورنال: Journal of the Physical Society of Japan
سال: 2021
ISSN: ['0031-9015', '1347-4073']
DOI: https://doi.org/10.7566/jpsj.90.083602