1. Brillouin scattering studies of liquid argon at high temperatures and high pressures.
- Author
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Ru Jia, Fangfei Li, Min Li, Qiliang Cui, Zhi He, Liancheng Wang, Qiang Zhou, Tian Cui, Guangtian Zou, Yan Bi, Shiming Hong, and Fuqian Jing
- Subjects
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BRILLOUIN scattering , *LIQUID argon , *DIAMOND anvil cell , *SOLIDIFICATION , *PRESSURE , *HEATS of vaporization - Abstract
Brillouin scattering measurements were performed on liquid argon in a diamond anvil cell at various solidification points up to 503 K. With the measured results from the 60° platelet-and 180° back-scattering geometries, the sound velocity, refractive index, experimental equation of state, and adiabatic bulk modulus of liquid argon as a function of pressure were determined. The discrepancy between experimental and previous calculated equation of state indicates that the many-body contribution to the density of liquid argon increases with increasing pressure and decreases with increasing temperature. By analyzing the Brillouin spectra in the coexistence of liquid and solid phase regions, the volume change and latent heat of solid-liquid transformation along the equilibrium curve have been also obtained for the first time. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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