Nonlinear acoustic spectroscopy on the real squashing collective mode in 3He-B

Research output: Contribution to journalArticle


  • H. Alles
  • A. V. Babkin
  • A. J. Manninen
  • K. Torizuka
  • J.P. Pekola

Research units


We have excited the real squashing (RSQ) collective modes in 3He-B with two simultaneous ultrasound pulses, yielding two-phonon absorption (TPA). We also detected TPA using single-frequency high-intensity sound pulses. The Zeeman splitting of the parametrically excited RSQ mode has been demonstrated. We checked the dispersion relations of the J=2+ modes in zero magnetic field and extracted the collective mode velocities directly from experiments.


Original languageEnglish
Pages (from-to)755-756
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberPart 1
Publication statusPublished - 2 Feb 1994
MoE publication typeA1 Journal article-refereed

    Research areas

  • collective modes, superfluid 3He, ultrasound

ID: 4397557