Differential osmotic pressure measurements of the concentration susceptibility of liquid /sup 3/He//sup 4/He mixtures near the lambda curve and tricritical point

Technical Report · Sun Feb 01 04:00:00 EST 1976

DOI:https://doi.org/10.2172/5368924· OSTI ID:5368924

Zimmermann, W. Jr.

Values of the concentration susceptibility, of liquid /sup 3/He//sup 4/He mixtures measured as the variation in /sup 3/He mole fraction with respect to the difference between molar chemical potentials of /sup 3/He and /sup 4/He have been determined near the lambda line and tricritical point from measurements of the differential osmotic pressure as a function of temperature T at four values of the /sup 3/He mole fraction, x = 0.594, x = 0.644, x = 0.680, and x = 0.706. In contrast to other determinations, results for the two values of x less than the tricritical value x/sub t/ = 0.675 show pronounced peaks at the lambda transition. Except perhaps for x < x/sub t/ in the normal-fluid region away from the transition, our data appear to be consistent with a simple tricritical scaling relationship.

• Research Organization: Minnesota Univ., Minneapolis (USA). School of Physics and Astronomy
• Sponsoring Organization: US Energy Research and Development Administration (ERDA)
• DOE Contract Number: EY-76-S-02-1569
• OSTI ID: 5368924
• Report Number(s): COO-1569-140
• Country of Publication: United States
• Language: English

Related Subjects

640460* -- Fluid Physics-- Other Quantum Fluids
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DISPERSIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HELIUM 3
HELIUM 4
HELIUM ISOTOPES
ISOTOPES
LAMBDA POINT
LIGHT NUCLEI
MIXTURES
NUCLEI
OSMOSIS
PHYSICAL PROPERTIES
QUANTITY RATIO
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE