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High‐pressure Brillouin study of the elastic properties of rare‐gas solid xenon at pressures up to 45 GPa
Author(s) -
Sasaki Shigeo,
Wada Naoyuki,
Kume Tetsuji,
Shimizu Hiroyasu
Publication year - 2009
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2087
Subject(s) - brillouin scattering , raman spectroscopy , brillouin spectroscopy , bulk modulus , adiabatic process , anisotropy , elastic modulus , brillouin zone , diffraction , shear modulus , materials science , raman scattering , chemistry , xenon , phase (matter) , condensed matter physics , molecular physics , analytical chemistry (journal) , thermodynamics , optics , composite material , physics , organic chemistry , chromatography , optical fiber
The pressure dependences of three adiabatic elastic constants, adiabatic bulk modulus, refractive index, and elastic anisotropy, as well as Cauchy deviation of fcc solid Xe have been determined up to 10 GPa at 296 K by high‐pressure Brillouin scattering spectroscopy. The characteristics of elastic properties at high pressure of rare‐gas solid Xe are investigated by comparison with the previous studies on Ne, Ar, and Kr. Above 10 GPa, the occurrence of splitting in the Brillouin signals and the direction dependence of acoustic velocities for solid Xe clearly show partial phase transformation to the hcp structure reported by the previous X‐ray diffraction and Raman scattering studies. The shear elastic modulus in the hcp phase of solid Xe has also been estimated at pressures up to 45 GPa by using the pressure dependence of the Raman wavenumber shift for the E 2 g mode. Copyright © 2008 John Wiley & Sons, Ltd.