We describe experiments in which a sound pulse is used to inject small particles into liquid helium at temperatures between 1 and 3 K. The motion of these particles is then observed. We are able to observe the effect of applying an impulse to a particle that is attached to a vortex. We also report on a number of surprising motions of particles and discuss possible explanations.
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Univ Calif Santa Barbara, Ctr Risk Studies & Safety, Dept Chem Engn, Santa Barbara, CA 93117 USAUniv Calif Santa Barbara, Ctr Risk Studies & Safety, Dept Chem Engn, Santa Barbara, CA 93117 USA
Kivotides, Demosthenes
Barenghi, Carlo F.
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Newcastle Univ, Sch Math & Stat, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, EnglandUniv Calif Santa Barbara, Ctr Risk Studies & Safety, Dept Chem Engn, Santa Barbara, CA 93117 USA
Barenghi, Carlo F.
Sergeev, Yuri A.
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Newcastle Univ, Sch Mech & Syst Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, EnglandUniv Calif Santa Barbara, Ctr Risk Studies & Safety, Dept Chem Engn, Santa Barbara, CA 93117 USA