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Microwave Spectroscopy of Condensed Helium at the Roton Frequency

  • A. Rybalko
  • S. Rubets
  • E. Rudavskii
  • V. Tikhiy
  • Y. Poluectov
  • R. Golovashchenko
  • V. Derkach
  • S. Tarapov
  • O. Usatenko
Article

Abstract

A spectral absorption line of electromagnetic radiation in the frequency range 40–200 GHz and at temperatures 1.4–2.75 K is measured in liquid helium. It is found that the narrow line of resonance absorption near the roton frequency does exist against a wide pedestal. The results obtained are compared with the data on the roton spectrum obtained in neutron scattering experiments. The possible reason for narrow absorption peak appearance is analyzed and the analogy between the observed phenomenon and Mössbauer effect is considered.

Superfluid helium Disk resonator Roton line 

PACS

67.10.Hk 67.30.eh 

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • A. Rybalko
    • 1
  • S. Rubets
    • 1
  • E. Rudavskii
    • 1
  • V. Tikhiy
    • 1
  • Y. Poluectov
    • 2
  • R. Golovashchenko
    • 3
  • V. Derkach
    • 3
  • S. Tarapov
    • 3
  • O. Usatenko
    • 3
  1. 1.B.I. Verkin Institute for Low Temperature Physics and EngineeringNational Academy of Sciences of UkraineKharkovUkraine
  2. 2.Kharkov Institute of Physics and TechnologyKharkovUkraine
  3. 3.Institute for Radiophysics and ElectronicsNational Academy of Sciences of UkraineKharkovUkraine

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