Abstract
We have performed measurements of third sound attenuation in thick films of superfluid 4He in the presence of small amounts of 3He. The attenuation due to 3He appears to depend linearly on the number density of 3He atoms in the film. We discuss the results in context of a recently proposed mechanism where the attenuation is caused by the interaction of the excitations in helium with the trapped vortices.
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Penanen, K., Hoffmann, J.A., Davis, J.C. et al. Effect of 3He on Third Sound Attenuation in Thick 4He Films. Journal of Low Temperature Physics 134, 1069–1077 (2004). https://doi.org/10.1023/B:JOLT.0000016730.44519.37
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DOI: https://doi.org/10.1023/B:JOLT.0000016730.44519.37