ABSORPTION OF STRONG ULTRASONIC WAVES IN INSULATORS.

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作者：

Kagan, V.D.

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来源：

Soviet Physics, Solid State (English translation of Fizika Tverdogo Tela) | 1977年 / 19卷 / 01期

关键词：

ULTRASONIC WAVES - Absorption;

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摘要：

The absorption of ultrasound in insulators is due to phonons that are in resonance with the ultrasonic wave. For strong ultrasonic waves, the resonant phonons can be separated into a group of drifting particles and a group of particles captured by the potential relief of the wave. The latter particles follow coherently the motion of the wave and absorb ultrasound at a rate governed by the relaxation of the particles on thermal phonons. Therefore, the absorption decreases as the fourth root of the intensity. 13 refs.

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页码：21 / 25