DYNAMIC STRUCTURE FACTOR OF A HELIUM-NEON DENSE GAS-MIXTURE - CROSSOVER FROM HYDRODYNAMICS TO THE MICROSCOPIC REGIME

被引：35

作者：

ENCISO, E ^{[1
]}

ALMARZA, NG ^{[1
]}

DOMINGUEZ, P ^{[1
]}

GONZALEZ, MA ^{[1
]}

BERMEJO, FJ ^{[1
]}

机构：

[1] CSIC,INST ESTRUCTURA MAT,E-28006 MADRID,SPAIN

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.74.4233

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The dynamic structure factor for a dense gas He/Ne mixture is calculated by molecular dynamics. At length scales within the realm of hydrodynamics, k0.03 -1, the spectrum shows a well-resolved Rayleigh-Brillouin triplet, evidencing the presence of sound-wave excitations. For intermediate wave vectors, the partial spectra apart from showing a broadening of the inelastic peaks unveil the presence of two additional modes with phase velocities below and above hydrodynamic sound. The present results cover a broad range of wave vectors, which cannot, at present, be reached by experimental techniques, and where present theoretical approaches are not well established. © 1995 The American Physical Society.

引用

页码：4233 / 4236

页数：4

共 6 条

[1] MICROSCOPIC DENSITY-FLUCTUATIONS IN A DENSE HELIUM-NEON GAS-MIXTURE
WESTERHUIJS, P
BESSELING, MT
DEGRAAF, LA
DESCHEPPER, IM
PHYSICA B, 1992, 182 (04): : 302 - 306
[2] Excitations in a dense helium-neon gas mixture
Montfrooij, W
Svensson, EC
CZECHOSLOVAK JOURNAL OF PHYSICS, 1996, 46 : 2559 - 2560
[3] FAST AND SLOW SOUND IN A DENSE GAS-MIXTURE OF HELIUM AND NEON
WESTERHUIJS, P
MONTFROOIJ, W
DEGRAAF, LA
DESCHEPPER, IM
PHYSICAL REVIEW A, 1992, 45 (06): : 3749 - 3762
[4] MICROSCOPIC DYNAMICS IN A DENSE HELIUM-ARGON GAS-MIXTURE
SMORENBURG, HE
DEGRAAF, LA
DESCHEPPER, IM
PHYSICS LETTERS A, 1993, 181 (04) : 321 - 324
[5] Dynamic structure in a molten binary alloy by ab initio molecular dynamics:: Crossover from hydrodynamics to the microscopic regime
González, DJ
González, LE
López, JM
Stott, MJ
EUROPHYSICS LETTERS, 2003, 62 (01): : 42 - 48
[6] Dynamic structure factor of the normal Fermi gas from the collisionless to the hydrodynamic regime
Watabe, Shohei
Nikuni, Tetsuro
PHYSICAL REVIEW A, 2010, 82 (03):

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