Negative ions at an interface between liquid helium mixtures
Abstract
The properties of electron bubbles electrostatically forced against an interface between liquid 3He and saturated 4He-3He mixture were determined at low temperatures. The equilibrium state of such objects is characterized by the binding energy of 6.5 K and oscillatory spectrum of first excitations with a frequency of 0.6.1010 s-1. The shifting electric field E = 100 V/cm at the temperature T = 0.2 K leads to decaying the bound bubble state with the lifetime τ ≈ 1 s. The experimental study of bubble electron states can appear to be useful for determining properties of an interface between liquid helium mixtures.
- Publication:
-
Low Temperature Physics
- Pub Date:
- October 2011
- DOI:
- 10.1063/1.3665872
- Bibcode:
- 2011LTP....37..803D
- Keywords:
-
- binding energy;
- bound states;
- interface states;
- liquid helium 3-4 mixtures;
- 67.60.-g;
- Mixed systems;
- liquid <sup>3</sup>He <sup>4</sup>He mixtures