Abstract
We report on experiments using energetic ultrasound pulses on superfluid 3He-B. Near the two-phonon pair breaking edge, at hf=Δ(T), an anomaly in ultrasonic attenuation has been detected. This feature grows with increasing acoustical intensity, and a new peak develops in the attenuation spectrum. The anomaly, coupling nonlinearly to ultrasound, can be observed also in the phase velocity of sound; in a magnetic field the anomaly splits to at least three features.
Original language | English |
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Pages (from-to) | 765-766 |
Number of pages | 2 |
Journal | Physica B: Condensed Matter |
Volume | 194-196 |
Issue number | Part 1 |
DOIs | |
Publication status | Published - 2 Feb 1994 |
MoE publication type | A1 Journal article-refereed |
Keywords
- nonlinear acoustics
- superfluid 3He
- ultrasound