First optical observations of superfluid He3

A. J. Manninen, J.P. Pekola, G. M. Kira, J. P. Ruutu, A. V. Babkin, H. Alles, O. V. Lounasmaa

Research output: Contribution to journalArticleScientificpeer-review

32 Citations (Scopus)


The shape of the free surface of rotating superfluid B3 has been investigated optically. The drastic change in viscosity at the superfluid transition was seen directly. Focusing of light reflected from the liquid surface and expansion of the light beam when it travels through the He3 sample show that the meniscus of the rotating superfluid has the same parabolic shape as that of the normal liquid, which implies an equilibrium density of vortices. The fountain effect in B3 could be seen directly as well: Liquid accumulates into the illuminated region.

Original languageEnglish
Pages (from-to)2392-2395
Number of pages4
JournalPhysical Review Letters
Issue number16
Publication statusPublished - 1992
MoE publication typeA1 Journal article-refereed


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