Heat capacity of dilute solutions of liquid He[superscript 3] in He[superscript 4] at low temperatures
Roach, William Ronald
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https://hdl.handle.net/2142/25069
Description
Title
Heat capacity of dilute solutions of liquid He[superscript 3] in He[superscript 4] at low temperatures
Author(s)
Roach, William Ronald
Issue Date
1966
Doctoral Committee Chair(s)
Wheatley, J.C.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Date of Ingest
2011-05-31T16:24:13Z
Keyword(s)
low temperature heat capacity
Helium 3
Helium 4
saturated vapor pressure
Language
en
Abstract
Heat capacity measurements were made on two dilute solutions
of 1iquid He3 in He4. These data, taken under saturated vapor
o 0 pressure at temperatures between .005 K and .20 K, are characteristic
of an ideal Fermi gas with m'l'< dependent only slightly on concentration.
The solution with a molar concentration of Re3 of (1.32 ± .01)% had a
degeneracy temperature of (.141 ± .002)oK and m*/m = 2.38 ±.04.
For the solution with a (5.02 -+ .03)% concentration of He3 the degenetacy
temperature was (.331 ± .004)oK while m*/m = 2,46 ± .04. The
slight dependence of m* on concentration can be explained in, terms of
the Landau theory of a Fermi liquid. The perturbation method, which
Bardeen, Baym j and Pines used to determine an,effective potential
v(q) between He 3 quasiparticles from later data on the magnetic properties of these solutions, was used to estimate the low temperature
contribution of the He 3 quasipartic1es to the thermal conductivity
and viscosity of dilute solutions.
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