High frequency acoustic measurements in liquid 3He near the transition temperature

Y. Lee*, P. J. Hamot, D. T. Sprague, T. M. Haard, J. B. Kycia, M. R. Rand, M. W. Meisel, William P Halperin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We have made accurate measurements of the phase velocity in liquid 3He at 0.6 bar near Tc using a path length modulation technique. The frequency used in this measurement (113 MHz) is much higher than any of the collective mode frequencies and well above the threshold for pair-breaking, ω ≫ Δ and ω ≫ 2Δ0. We have observed a sharp but small linear increase in the phase velocity below Tc and a small decrease from the expected behavior in the normal fluid region very close to the transition temperature.

Original languageEnglish (US)
Pages (from-to)265-272
Number of pages8
JournalJournal of Low Temperature Physics
Issue number5-6
StatePublished - Jan 1 1996

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics


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