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VOLUME 58 (1993) | ISSUE 5 | PAGE 358
Surface normal component of a superfluid liquid
The surface density of the normal component of a superfluid liquid, which characterizes the superfluid flow along the surface of a solid, is governed by the statistical properties of the surface roughness features. The effect of the roughness features of the substrate surface on the velocity of third sound in helium films is found. Experimental data are discussed.