The mixed longitudinal-transverse nature of collective modes in water

Details The mixed longitudinal-transverse nature of collective modes in water The mixed longitudinal-transverse nature of collective modes in water

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12e3008c&link_type=abstract

New Journal of Physics, Volume 12, Issue 5, pp. 053008 (2010).

Physics

1

Scientific paper

We report high-resolution, high-statistics inelastic x-ray scattering measurements of the dynamic structure factor of water as a function of momentum and energy transfer in various thermodynamic conditions, including high-pressure liquid near the melting point, supercooled liquid and polycrystalline ice. For momentum transfer values below 8 nm-1, two collective excitations associated with longitudinal and transverse acoustic modes were observed. Above 8 nm-1, another excitation was detected in the liquid. Comparison with polycrystalline data and molecular dynamics simulations suggests that this mode is related to longitudinal-transverse mixing of mode symmetry.

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