(He/sup 3/)/sub 2/ van der Waals molecular dimers in solutions of the quantum liquids He/sup 3/--He II

Journal Article · Tue Jan 01 04:00:00 EST 1980 · Sov. Phys. - JETP (Engl. Transl.); (United States)

OSTI ID:5154061

Bashkin, E P

Bound states of He/sup 3/ impurity quasiparticle pairs, produced as a result of van der Waals attraction on the free surface in thin films, in narrow capillaries, and on vortex filaments in superfluid He/sup 4/ are investigated. With decreasing temperature, the contribution of the bound states to the thermodynamics of the solution becomes decisive. The coefficient of inelastic absorption of first sound due to the bound state in the field of the acoustic wave is calculated. It is predicted that a system of impurity excitations in narrow capillaries or on vortex filaments can have a resonant singularity (at a frequency corresponding to the threshold of the splitting of the bound state) wherein the absorption coefficient for monochromatic sound becomes infinite. The temperature of the gas-liquid phase transition and the superfluid transition temperature are calculated for a Bose system of van der Waals pairs (He/sup 3/)/sub 2/ on a surface and in thin He II films. It is shown that the superfluid transition temperature can be of the order of 35 mK.

• Research Organization: Institute of Physics Problems, USSR Academy of Sciences
• OSTI ID: 5154061
• Journal Information: Sov. Phys. - JETP (Engl. Transl.); (United States), Journal Name: Sov. Phys. - JETP (Engl. Transl.); (United States) Vol. 51:1; ISSN SPHJA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOUND STATE
DIMERS
DISPERSIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FILMS
FLUIDS
HELIUM 3
HELIUM 4
HELIUM II
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MIXTURES
NUCLEI
PHYSICAL PROPERTIES
QUANTUM FLUIDS
SINGULARITY
SOLUTIONS
SOUND WAVES
STABLE ISOTOPES
SUPERFLUIDITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
TRANSITION TEMPERATURE
VAN DER WAALS FORCES
VORTICES