Compressibility, Thermal Expansion, and Other Properties of Helium-Three

摘要: Measurements of pressure versus temperature solid ${\mathrm{He}}^{3}$ have been made for various constant volumes between 17.6 and 24.7 ${\mathrm{cm}}^{3}$/mole, in the range from 0.35\ifmmode^\circ\else\textdegree\fi{}K to melting point. Use was a sensitive capacitive strain gauge, which is described. From pressure, compressibility thermal expansion coefficient are obtained. By extending isochores into liquid region, these quantities also obtained at melting. The compressibilities equilibrium curve nearly equal. positive investigated. Comparison with specific heats other results made, values Gr\"uneisen $\ensuremath{\gamma}$ Debye $\ensuremath{\theta}$ A discontinuity volume about 0.1 ${\mathrm{cm}}^{3}$/mole bcc-hcp phase transition down found.