Effect of Helium Elasticity on Torsional Oscillator Measurements
Autor: | Humphrey J. Maris, Sébastien Balibar |
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Rok vydání: | 2010 |
Předmět: |
Physics
chemistry.chemical_element Mechanics Moment of inertia Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 010305 fluids & plasmas Superfluidity Supersolid Classical mechanics chemistry 0103 physical sciences General Materials Science Elasticity (economics) 010306 general physics Torsional oscillator Helium |
Zdroj: | Journal of Low Temperature Physics |
ISSN: | 1573-7357 0022-2291 |
Popis: | In 2004 Kim and Chan performed a torsional oscillator measurement of the rotational inertia of solid helium-4. They found frequency changes which were interpreted in terms of a non-classical rotational inertia, that is a partial superfluidity or "supersolidity" of solid helium-4. Since then there have been many further studies using various versions of this technique. One important question that arises in these experiments is the possible effect on the oscillator frequency of changes in the elas- ticity of the solid helium; this can produce a change in frequency that adds to any effect due to superfluidity. In this paper we give a general discussion of the effect of changes in elasticity on the oscillator frequency and consider how the magnitude of the effect is influenced by the oscillator design. Our results should help make it possible to discriminate between frequency changes due to changes in elasticity and changes due to supersolidity. |
Databáze: | OpenAIRE |
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