Energy loss of fourth sound in superfluid 3He within small pores

Y. Nago, C. Kato, K. Obara, H. Yano, O. Ishikawa, T. Hata

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We performed a high-sensitivity fourth sound resonance experiment for pure superfluid 3He at 29.0 bar in sintered silver powder cell to clarify the hydrodynamic property of 3He in the aerogel-sintered silver system. We discuss the energy loss of fourth sound. An anomaly in the energy loss at the AB phase transition as found in the aerogel system was not observed. Our analysis shows that the energy loss Q -1, which monotonically decreases with decreasing temperature, can be understood by the hydrodynamic theory in the B phase qualitatively and quantitatively. We estimated the effective pore radius R in the powder cell.

Original languageEnglish
Pages (from-to)476-481
Number of pages6
JournalJournal of Low Temperature Physics
Issue number3-4
Publication statusPublished - 2008 Feb


  • Aerogel
  • Hydrodynamics
  • Restricted geometry
  • Superfluid He

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Materials Science
  • Condensed Matter Physics


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