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Effect of 3He on Third Sound Attenuation in Thick 4He Films |
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| Authors: | K Penanen J A Hoffmann J C Davis R E Packard |
| Affiliation: | 1. Physics Department, University of California at Berkeley, Berkeley, California, 94720, USA 2. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, 91109, USA 3. LASSP, Physics Department, Cornell University, Ithaca, New York, 14853, USA |
| 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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