Ultrasonic Attenuation in the Noble Metals

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Abstract
Measurements of the electronic component of the acoustic attenuation in the noble metals are reported for longitudinal waves with frequencies between 30 and 330 Mc/sec. These data are compared to theory using the known shapes of the Fermi surfaces and symmetrized harmonic expansions for their deformation properties. The resulting fits suggest that the deformation of the Fermi surfaces cannot be represented by low-order expansions. Nevertheless, it is possible to draw some qualitative conclusions about the anisotropy of the electron-phonon interaction in the noble metals at low wave numbers.

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