Cage diffusion in liquid mercury

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Cage diffusion in liquid mercury

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/7211

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Title: Cage diffusion in liquid mercury
Author: Badyal, Yaspal S.; Bafile, Ubaldo; Miyazaki, Kunimasa; Schepper, Ignatz de; Montfrooij, Wouter
Keywords: diffusion and thermal diffusion
transport processes
liquid metals and alloys
inelastic neutron scattering
Date: 2003-12-31
Publisher: American Physical Society
Citation: Phys. Rev. E 68, 061208 (2003) [7 pages]
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
ISSN: 1539-3755

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