Thermal-transport properties in the normal phase of dilute sup 3 He- sup 4 He mixtures

Journal Article · Sat Jun 01 04:00:00 EDT 1991 · Journal of Low Temperature Physics; (United States)

DOI:https://doi.org/10.1007/BF00683628· OSTI ID:5361897

Tuttle, J; Zhong, Fang; Meyer, H ^[1]

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1. Duke Univ., Durham, NC (United States)

Steady-state measurements of the thermal diffusion ratio k{sub T} and of the heat conductivity {kappa} are presented for three dilute mixtures of {sup 3}He in {sup 4}He with concentrations 9 {times} 10{sup {minus}3} {le} X ({sup 3}He) {le} 5 {times} 10{sup {minus}2} at saturated vapor pressure in the normal phase close to the superfluid transition. The data are compared with predicts by Dohm and Folk from the renormalization group (RG) theory. From auxiliary determinations of thermodynamic derivatives for these mixtures, the authors obtain the separation factor {Psi} = {minus}(k{sub T}/T) {times} ({partial derivative}{rho}/{partial derivative}X){sub T,P}/({partial derivative}{rho}/{partial derivative}T){sub X,P} above T{sub {lambda}} over the range where k{sub T} is positive. Here {rho} is the mass density. From the transients of {delta}X(t) as a function of time, they obtain an estimation for the mass diffusion coefficient D and compare the results with predictions by Dohm and Folk and with results from other experiments.

• OSTI ID: 5361897
• Journal Information: Journal of Low Temperature Physics; (United States), Journal Name: Journal of Low Temperature Physics; (United States) Vol. 83:5-6; ISSN 0022-2291; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

665420* -- Superfluidity-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIFFUSION
DISPERSIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FLUIDS
HELIUM 3
HELIUM 4
HELIUM II
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MIXTURES
NUCLEI
PHYSICAL PROPERTIES
QUANTUM FLUIDS
STABLE ISOTOPES
STEADY-STATE CONDITIONS
SUPERFLUIDITY
THERMAL CONDUCTIVITY
THERMAL DIFFUSION
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE