Publikation: Lifetimes of hypersonic phonons in solid 4He
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1974
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Proceedings of the International Conference on Low Temperature Physics [LT-13]. 1974, pp. 53-61
Zusammenfassung
The quantum liquid "superfluid helium" shows several outstanding properties as compared to normal liquids. In contrast to this the quantum crystal "solid helium" (in the foIlowing we shall only consider 4He} seems to exhibit no remarkable diffcrenccs with respect to ordinary solids. For example, solid helium was found to have well-defined crystal structures, specific heat and sound velocity measurements remained without surprise, and neutron scattering experiments led to the usual dispersion spectrum for phonons. After initial difficulties due to the large zeropoint motion the theoretical treatment of these phonons has been quite successful. Using techniques like self-consistent field methods, the calculations for the phonon frequencies are in fair agreement with all these experiments.
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530 Physik
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Low Temperature Physics [LT-13], 21. Aug. 1972 - 25. Aug. 1972, Univ. of Colorado
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LEIDERER, Paul, Paul BERBERICH, Siegfried HUNKLINGER, Klaus DRANSFELD, 1974. Lifetimes of hypersonic phonons in solid 4He. Low Temperature Physics [LT-13]. Univ. of Colorado, 21. Aug. 1972 - 25. Aug. 1972. In: Proceedings of the International Conference on Low Temperature Physics [LT-13]. 1974, pp. 53-61BibTex
@inproceedings{Leiderer1974Lifet-5016,
year={1974},
title={Lifetimes of hypersonic phonons in solid 4He},
booktitle={Proceedings of the International Conference on Low Temperature Physics [LT-13]},
pages={53--61},
author={Leiderer, Paul and Berberich, Paul and Hunklinger, Siegfried and Dransfeld, Klaus}
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<dcterms:abstract xml:lang="eng">The quantum liquid "superfluid helium" shows several outstanding properties as compared to normal liquids. In contrast to this the quantum crystal "solid helium" (in the foIlowing we shall only consider 4He} seems to exhibit no remarkable diffcrenccs with respect to ordinary solids. For example, solid helium was found to have well-defined crystal structures, specific heat and sound velocity measurements remained without surprise, and neutron scattering experiments led to the usual dispersion spectrum for phonons. After initial difficulties due to the large zeropoint motion the theoretical treatment of these phonons has been quite successful. Using techniques like self-consistent field methods, the calculations for the phonon frequencies are in fair agreement with all these experiments.</dcterms:abstract>
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