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    Cage diffusion in liquid mercury

    Badyal, Yaspal S.
    Bafile, Ubaldo
    Miyazaki, Kunimasa
    Schepper, Ignatz de
    Montfrooij, Wouter
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    [PDF] CageDiffusionLiquidMercury.pdf (144.8Kb)
    Date
    2003
    Format
    Article
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    Abstract
    We present inelastic neutron scattering measurements on liquid mercury at room temperature for wave numbers q in the range 0.3 <q<7.0Å-1. We find that the energy half width of the incoherent part of the dynamic structure factor S(q,E) is determined by a self-diffusion process. The half width of the coherent part of S(q,E) shows the characteristic behavior expected for a cage diffusion process. We also show that the response function at small wave numbers exhibits a quasielastic mode with a time scale characteristic of cage diffusion, however, its intensity is larger by an order of magnitude than what would be expected for cage diffusion. We speculate on a scenario in which the intensity of the cage diffusion mode at small wave numbers is amplified through a valence fluctuation mechanism.
    URI
    http://hdl.handle.net/10355/7211
    Citation
    Phys. Rev. E 68, 061208 (2003) [7 pages]
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    • Physics and Astronomy publications (MU)

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