Elastic Properties and Density of Helium up to 20 GPa

1 December 1986

journal article
Published by IOP Publishing in Europhysics Letters

Vol. 2 (11) , 849-855
https://doi.org/10.1209/0295-5075/2/11/006

Abstract

Using Brillouin scattering, we have measured the sound velocity in fluid and solid helium 4 at room temperature up to 20 GPa. Our results show that the pair potentials currently used to describe helium are inadequate. The density of the fluid is determined as a function of pressure up to the fusion point. In the solid, the sound velocity and the elastic anisotropy are compared with lattice dynamics calculations.

Keywords

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