Nonlinear acoustical investigations of 3He-B near the two-phonon pair breaking edge

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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.

Details

Original languageEnglish
Pages (from-to)765-766
Number of pages2
JournalPhysica B: Condensed Matter
Volume194-196
Issue numberPart 1
Publication statusPublished - 2 Feb 1994
MoE publication typeA1 Journal article-refereed

    Research areas

  • nonlinear acoustics, superfluid 3He, ultrasound

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