Phase diagram and concentration susceptibility of3He-4He mixtures near the tricritical point

✍ Scribed by Henry A. Kierstead

• Publisher: Springer US
• Year: 1979
• Tongue: English
• Weight: 636 KB
• Volume: 35
• Category: Article
• ISSN: 0022-2291
• DOI: 10.1007/bf00121720

✦ Synopsis

The inverse concentration susceptibility (~&/c~x)x of ~He-4He mixtures has been calculated from high-resolution vapor-pressure measurements and in situ measurements of the dielectric constant very close to the tricritical point. The measurements have been fitted to a scaling-law equation of state. In the normal fluid a logarithmic correction term was necessary to obtain a good fit. In the superfluid a regular correction term, proportional to (x -Xt) 2, was evaluated. New measurements of the phase-separation curve confirm our earlier 9 3 9 9 measurements on the He-rtch side and extend the measurements much closer to the tricritical point on the 4He-rich side.