Investigation of the lifetime of longitudinal phonons at GHz frequencies in liquid and solid 4He

Berberich, Paul; Leiderer, Paul; Hunklinger, Siegfried

Investigation of the lifetime of longitudinal phonons at GHz frequencies in liquid and solid 4He

Dateien

014_jlowtempph_1976.pdfGröße: 2.46 MBDownloads: 493

Datum

1976

Autor:innen

Berberich, Paul

Leiderer, Paul

Hunklinger, Siegfried

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Journal of Low Temperature Physics. 1976, 22(1-2), pp. 61-84. Available under: doi: 10.1007/BF00655215

Zusammenfassung

The attenuation of longitudinal 1-GHz phonons was measured as a function of temperature in liquid 4He at svp and at 23 bar as well as in hcp 4He at 36 bar. The lifetime of the phonons which were generated by stimulated Brillouin scattering was determined optically by a probing light pulse. The results in liquid 4He are discussed in terms of relaxation processes in the phonon and roton gas and are in good agreement with existing work. The attenuation in hcp 4He, which approximately shows a T 4 temperature dependence, is attributed to three-phonon processes with longitudinal thermal phonons. A quantitative comparison with Landau-Ruiner theory gives satisfactory agreement with the data. No effect of phonon dispersion on sound attenuation is found down to 0.8 K.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

BERBERICH, Paul, Paul LEIDERER, Siegfried HUNKLINGER, 1976. Investigation of the lifetime of longitudinal phonons at GHz frequencies in liquid and solid 4He. In: Journal of Low Temperature Physics. 1976, 22(1-2), pp. 61-84. Available under: doi: 10.1007/BF00655215

BibTex

@article{Berberich1976Inves-4672,
  year={1976},
  doi={10.1007/BF00655215},
  title={Investigation of the lifetime of longitudinal phonons at GHz frequencies in liquid and solid 4He},
  number={1-2},
  volume={22},
  journal={Journal of Low Temperature Physics},
  pages={61--84},
  author={Berberich, Paul and Leiderer, Paul and Hunklinger, Siegfried}
}

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