Low Temperature Physics: 37, 803 (2011); https://doi.org/10.1063/1.3665872 (3 pages)
Fizika Nizkikh Temperatur: Volume 37, Number 9-10 (September 2011), p. 1008-1010 ( to contents , go back )
Negative ions at helium mixtures interface
A.M. Dyugaev, P.D. Grigoriev
L.D. Landau Institute for Theoretical Physics, Chernogolovka, Russia
Institute of Solid State Physics RAS, Chernogolovka, Moscow district 142432, Russian Federation
Received March 4, 2011
The properties of electron bubbles localized at the interface between 3He and 3He–4He mixture by polarization attraction force have been studied in a lowtemperature region. The equilibrium state of such objects is characterized by a binding energy of 6.5 K and an oscillating spectrum of the first excitations with a frequency 0.6·1010 s–1. Shifting electric field E = 100 V/cm at T = 0.2 K leads to decay of the binding bubble state with lifetime τ ≈ 1 s. The experimental study of bubble electron states may be useful for testing liquid helium mixtures interface.
PACS: 67.60.G Solutions of 3He in liquid 4He.
Key words: low temperatures, negative ions, liquid helium mixtures.