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2011 | 119 | 6 | 807-813
Article title

Weak ^{3}He Pairing in ^{3}He-He(II) Mixtures

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EN
Abstracts
EN
In this paper a theoretical study of a possible phase transition in dilute ^3He-He(II) mixtures is presented using the Galitskii-Migdal-Feynman formalism. The effective scattering length is calculated from the Galitskii-Migdal-Feynman T-matrix, which is essentially the effective scattering amplitude dependent on the medium. It is found that at very low ^3He concentrations the s-wave effective scattering length for ^3He-He(II) varies discontinuously from positive to negative values at some critical concentration. This indicates a crossover from a regime with dimers to another with the Cooper pairs. The binding energy of the weakly-bound dimers ^3He_2 is computed. The effective p-wave scattering lengths are calculated and compared to the effective s-wave scattering lengths at low and high concentrations. It is found that p-scattering has an important effect on the instability of these mixtures at concentrations x > 1%. Finally, the transport coefficients are computed and compared to the theoretical predictions of Fu and Pethick and the experimental results of König and Pobell.
Keywords
EN
Publisher

Year
Volume
119
Issue
6
Pages
807-813
Physical description
Dates
published
2011-06
received
2010-04-22
(unknown)
2010-08-09
(unknown)
2010-12-23
Contributors
author
  • Department of Applied Sciences, Faculty of Engineering Technology, Al-Balqa' Applied University, Amman, Jordan
author
  • Applied Physics Department, Tafila Technical University, Tafila, Jordan
author
  • Department of Physics, Hashemite University, Zarqa, Jordan
author
  • Department of Physics, University of Jordan, Amman, Jordan
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv119n613kz
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