Heat pulse propagation in liquid {sup 4}He revisited
Journal Article
·
· Journal of Low Temperature Physics
- Technische Universitaet Muenchen, Garching (Germany)
The authors have studied the propagation of heat pulses in superfluid helium at 0.1 K. Their experiments agree with a simple picture of a propagating cloud of interacting excitations, rather than with the surface rotons invoked by the Exeter group. The {open_quotes}Q-peak{close_quotes} observed in double pulse experiments is interpreted as a shock wave propagating in the cloud. The authors have observed for the first time that the Q-peak splits up in two distinct modes at intermediate helium pressures. They believe this is evidence for a decoupling of the phonon and roton gasses as predicted by Castaing.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 530546
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 5-6 Vol. 106; ISSN 0022-2291; ISSN JLTPAC
- Country of Publication:
- United States
- Language:
- English
Similar Records
Roton propagation and phonon-roton scattering in He II
Quasiequilibrium distribution function of anisotropic phonon systems and the interaction of pulses of low-energy phonons in superfluid helium
Experiments of superfluid /sup 4/He evaporation
Journal Article
·
Wed Mar 31 23:00:00 EST 1976
· Phys. Rev., B, v. 13, no. 7, pp. 2898-2909
·
OSTI ID:4015508
Quasiequilibrium distribution function of anisotropic phonon systems and the interaction of pulses of low-energy phonons in superfluid helium
Journal Article
·
Mon Aug 01 00:00:00 EDT 2005
· Physical Review. B, Condensed Matter and Materials Physics
·
OSTI ID:20719298
Experiments of superfluid /sup 4/He evaporation
Journal Article
·
Sun Oct 01 00:00:00 EDT 1978
· Phys. Rev., B: Solid State; (United States)
·
OSTI ID:6580023