7 research outputs found
Variational Calculations for He Impurities on He Droplets
Full text linkVariational Monte Carlo method is used to calculate ground state properties
of He droplets, containing 70, 112, 168, 240, 330, and 728 particles. The
resulting particle and kinetic energy densities are used as an input in the
Feynman-Lekner theory for He impurities. The kinetic energy density of
He atoms and the energy of the He surface states are compared with the
results of previous phenomenological calculations.Comment: 12 pages, in revtex 3.0, with 5 .ps figure
HEAT CONDUCTION BY RIPPLONS ON THE SURFACE OF 4He
No full textLa conductivité thermique associée aux "ripplons" sur la surface d'un film de 4He a été mesurée. Le transport de chaleur est attribué à un écoulement hydrodynamique du gaz de ripplons, limité par le transfert de l'impulsion au substrat du film. Ce courant est fortement réduit par la présence de 3He sur la surface.The heat conductivity due to ripplons on the surface of the 4He film has been measured. The transport of heat is attributed to a hydrodynamic flow of the ripplon gas, limited by momentum transfer to the substrate beneath the film. The ripplon current is greatly reduced by a small amount of 3He on the surface
