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DOI 10.1103/PhysRevLett.93.097801
Title Fast sound in expanded fluid Hg accompanying the metal-nonmetal transition
Creator/Author Ishikawa, D. [Graduate School of Engineering, Kyoto University, Kyoto, 606-8501 (Japan) ; SPring-8/RIKEN 1-1-1 Kouto, Mikazuki-cho, Sayo-gun, Hyogo-ken, 679-5148 (Japan)] ; Inui, M. [Faculty of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima 739-8521 (Japan)] ; Matsuda, K. ; Tamura, K. [Graduate School of Engineering, Kyoto University, Kyoto, 606-8501 (Japan)] ; Tsutsui, S. ; Baron, A.Q.R. [SPring-8/JASRI 1-1-1 Kouto, Mikazuki-cho, Sayo-gun, Hyogo-ken, 679-5198 (Japan)]
Publication Date2004 Aug 27
OSTI IdentifierOSTI ID: 20574199
Other Number(s)Journal ID: ISSN 0031-9007; PRLTAO; TRN: US04B3327026026
Resource TypeJournal Article
Resource RelationJournal: Physical Review Letters; Journal Volume: 93; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevLett.93.097801; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); PBD: 27 Aug 2004
Subject71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COLLECTIVE EXCITATIONS; DISPERSION RELATIONS; HYDRODYNAMICS; LIQUID METALS; MERCURY; MOMENTUM TRANSFER; NONMETALS; SOUND WAVES; SPATIAL RESOLUTION; STRUCTURE FACTORS; VELOCITY; X-RAY DIFFRACTION
Description/Abstract The dynamic structure factor S(Q,{omega}) of expanded fluid Hg has been measured up to the metal-nonmetal transition region at 9.0 g cm{sup -3} (1723 K and 1940 bars) using high-resolution inelastic x-ray scattering, at momentum transfers, Q, from 0.2 to 4.8 A{sup -1}. Analysis in the framework of generalized hydrodynamics reveals that the frequencies of the collective excitations increase faster with Q than estimated from the macroscopic speed of sound. The effective sound velocity at 9.0 g cm{sup -3} estimated from the dispersion relation is triple the ultrasonic sound velocity. The present result suggests the existence of fast sound in expanded fluid Hg accompanying the metal-nonmetal transition.
Country of PublicationUnited States
LanguageEnglish
FormatSize: page(s) 097801-097801.4
System Entry Date2005 Apr 24

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