The overpressurization of superfluid He 4 under crystallization is studied experimentally. The effect of a substrate and He 3 impurities on the nucleation rate W is observed. The dependence of the metastable state lifetime versus the overpressurization and temperature is measured in the range 10-7-1
Possibility of a temperature gap when heating a rotating superfluid4He
β Scribed by Shosuke Sasaki
- Book ID
- 103940466
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 119 KB
- Volume
- 194-196
- Category
- Article
- ISSN
- 0921-4526
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β¦ Synopsis
We investigate a rotating superfluid 4He which flows through atroidal channel. When the rotating superfluid helium is heated, we may expect to find new phenomena from our theory where there are two possibilities: (1) The rotating superfluid component suddenly disappears at atemperature. Then, the temperature suddenly rises to the 2, -transition temperature. A temperature gap appears. (2) The velocity of the superfluid component decreases gradually, and the temperature rises continuously.
π SIMILAR VOLUMES
A review is given on the effect of a stationary heat current Q on the superfluid transition of 4He in the linear and nonlinear response regime. Results on various static and dynamic quantities as derived by the renormalizationgroup theory are discussed. This includes the temperature profile, the the
In the presence of a homogeneous heat current the isotropy of supetfluid 4He is broken and the propagation of second-sound waves becomes anisotropic. We calculate the angular dependence of the velocity and damping of second sound near T~ within model F of Halperin, Hohenberg and Siggia to leading or