Article

Thermal conductivity of low-density solid 4He

A. A. GolubPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovS. V. SvatkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov

Soviet Journal of Low Temperature Physicsjournal1980en

ABI

Abstract

Measurements of the thermal conductivity of helium crystals with a molar volume of 20.56 cm3/mole are reported for the temperature interval 0.4−1.8 °K. Analysis of the results has disclosed a possible significant influence of dislocations on the thermal conductivity of helium in the regime of Poiseuille phonon gas flow. The values of the dislocation density and the time for normal phonon–phonon collisions are estimated. An explanation is proposed for the discrepancies among the results of various investigators in the Poiseuille flow regime.

Topics

Quantum, superfluid, helium dynamics High-pressure geophysics and materials Atomic and Subatomic Physics Research

Identifiers

DOI: 10.1063/10.0030114

Citations and references

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