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Sound Velocity and Adiabatic Compressibility of Liquid Helium Three

H.L. LaquerLos Alamos Scientific Laboratory, University of California, Los Alamos, New MexicoS. G. SydoriakLos Alamos Scientific Laboratory, University of California, Los Alamos, New MexicoThomas RobertsLos Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico
1959en
ABI

Abstract

The velocity of first sound at 5 Mc/sec was measured in liquid ${\mathrm{He}}^{3}$ between 0.34 and 3.14\ifmmode^\circ\else\textdegree\fi{}K. The results are fitted within 0.2% by the equation $u=183.9\ensuremath{-}5.98{T}^{2}\ensuremath{-}0.130{T}^{3}\ensuremath{-}0.00176{T}^{8}$ (m/sec). Initial pressure coefficients of the sound velocities and a number of derived thermodynamic quantities are also reported.

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