On the possibility of attaining the Bose-condensation region in spin-polarized atomic hydrogen at ultra-low temperatures

Abstract

It is shown that the adsorption of atomic hydrogen on the He 4 surface is predominantly accompanied by excitation of the surface wave. At ultra-low temperatures a strong decrease in the adsorption rate with temperature is found to result in a surface density of adsorbed atoms essentially lower than its equilibrium value. Therefore the channels of recombination of atomic hydrogen on the surface prove to be suppressed and it becomes possible to make compatible the Bose-condensation and the long lifetime of the spin-polarized atomic hydrogen gas.