Abstract
We study the response of Bose4He clusters to an external field corresponding to a rotation with frequency ω. An explicit form for the normal (nonsuperfluid) fraction of the system as a function of the temperatureT and of the mass numberN of the cluster is obtained under the assumption that only surface modes are thermally excited. The critical behaviour of4He clusters at high rotational frequencies is also investigated.
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More From: Zeitschrift f�r Physik D Atoms, Molecules and Clusters
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