Calculations of the frequencies and damping of the normal modes of ion pools in liquid 4He
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Colleges, School and Institutes
For crystalline ion pools trapped just beneath the surface of superfluid He-4, we present a new calculation of the phonon frequencies, and extend this calculation to motion normal to the ion plane. We calculate the damping due to the cubic anharmonicity associated with each in-plane normal mode. We find well defined transverse modes, but difficulties associated with the damping of long wavelength longitudinal modes. Simple arguments are presented to discuss these problems.
|Number of pages||2|
|Journal||Czechoslovak Journal of Physics|
|Publication status||Published - 1 Jan 1996|