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https://hdl.handle.net/2142/30397
Description
Title
The Kapitza resistance at metal-helium interfaces
Author(s)
Folinsbee, James Terwillegar
Issue Date
1974
Doctoral Committee Chair(s)
Anderson, A.C.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Kapitza resistance
metal-helium interfaces
Language
en
Abstract
The Kapitza resistance has been measured between liquid or solid 3He or
4He and surfaces of Mg, Cu, W, and Au in the temperature range 0.03-0.3 K.
The experimental data are in relatively good agreement with the acoustic
mismatch theory modified so as to include phonon attenuation in the metal.
Below 0.1 K the Kapitza resistance of liquid 3He is often reduced relative
to that of liquid 4He , suggesting the presence of an enhanced thermal conductance
between liquid 3He and metals, as has been observed in other
laboratories.
Measurements of the Kapitza resistance have also been made at liquid and
solid 4He - Cu interfaces and at solid Ne-Cu interfaces at 0.4 - 1.2 K. The
results show that the resistances at both liquid and solid He-Cu interfaces
at these temperatures are anomalously low, but that the Ne-Cu boundary resistance
may be adequately explained by the acoustic mismatch theory.
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