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Compressed He3 and He4

  • William E. Keller
Part of the The International Cryogenics Monograph Series book series (INCMS)

Abstract

Some of the more surprising aspects of both He3 and He4 are the exceedingly complex phase diagrams which have been mapped for these seemingly simple substances. In connection with the λ-transition of He4, we have already seen how the P-V-T and thermal properties behave anomalously, as we have also discussed some of the unusual characteristics of compressed liquid He3 as a Fermi liquid. While these are generally understandable as direct consequences of the degeneracy conditions of nonideal quantum fluids, there are several other remarkable equilibrium features attributable to quantum effects. Principal among these are first, that the solidification curves for both liquids display a minimum in the P-T plane, and second, that both isotopes have been found to exist in three different stable crystallo-graphic modifications.

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Copyright information

© Springer Science+Business Media New York 1969

Authors and Affiliations

  • William E. Keller
    • 1
  1. 1.Los Alamos Scientific LaboratoryLos AlamosUSA

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