Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Humphrey J"'
Autor:
Humphrey J. Maris, Ambarish Ghosh
Publikováno v:
Journal of Low Temperature Physics. 134:251-256
We have perforated a series of experiments to study cavitation in superfluid helium into which electrons are injected by field-emission from a sharp tip. The injected electrons force open small cavities in the liquid (“electron bubble”). These ob
Publikováno v:
Journal of Low Temperature Physics. 134:227-235
We give a survey of recent experimental and theoretical work on the effect of light on electron bubbles in liquid helium. The light-induced change in the bubbles is measured using an ugtrasonic technique. In helium at temperatures above about 1.7 K,
Publikováno v:
Physica B: Condensed Matter. :356-359
We review the present understanding of liquid helium outside its usual stability range. Most theoretical predictions and experiments concern the negative pressure region, where the phenomenon of cavitation has to be considered in relation with the ex
Autor:
Denis Konstantinov, Humphrey J. Maris
Publikováno v:
Journal of Low Temperature Physics. 121:609-613
An electron injected into liquid helium-4 forms a bubble of radius approximately 19 A. The size of the bubble is determined by a balance between the zero-point energy of the electron, the surface energy of the bubble wall, and the polarization energy
Publikováno v:
Journal of Low Temperature Physics. 114:523-545
We present an analysis of the small amplitude shape oscillations of a superfluid helium drop surrounded by saturated helium vapor. The equations of the two-fluid model are used to describe the liquid motion within the drop. The calculations are perfo
Publikováno v:
Physical Review B. 57:3000-3010
We describe a number of experiments in which the effect of electrons on cavitation is studied. Electrons in liquid helium become trapped in a bubble from which the liquid is almost completely excluded. By applying a negative pressure to the helium, w
Publikováno v:
Journal of Low Temperature Physics. 110:431-436
Electrons injected into liquid helium become trapped in a spherical cavity from which the liquid is almost completely excluded. When a negative pressure is applied to the liquid the size of the electron bubble increases, and at a critical negative pr
Publikováno v:
Journal of Low Temperature Physics. 110:173-178
We report on an experimental study of the shape oscillations of charged helium drops levitated with a magnetic field. Shape oscillations are excited with an AC electric field. Many different modes of oscillation of the drop are observable. The resona
Publikováno v:
Journal of Low Temperature Physics. 113:485-490
A charged particle passing through a bubble chamber produces a track of bubbles. The way in which these bubbles are produced has been a matter of some controversy. We consider the possibility that in helium and hydrogen bubble chambers the production
Publikováno v:
Journal of Low Temperature Physics. 98:17-35
We describe experiments on the laser levitation of superfluid helium. Liquid drops of 10–20 μm diameter are produced by a submerged piezoelectric transducer and suspended in vapor at 2K for up to 3 minutes. The optical trap is formed by two counte