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Ions and electrons in liquid helium

Armando Francesco Borghesani


In liquid helium, an electron is surrounded by a cavity called an electron bubble of 20 Ångstroms in diameter. A positive helium ion is solvated by an electrostriction induced solid helium-ice shell called a snowball of 7 Ångstroms in diameter. By studying their transport properties, these objects are well suited for the testing of the microscopic properties of superfluidity. At low temperatures and with small electric fields, the drift velocity of the charges depends on their interaction with the elementary excitations of the superfluid: phonons, rotons, and 3He atomic impurities. At higher f ... More

Keywords: superfluidity, electron bubble, snowball, drift velocity, rotons, phonons, vortex rings, vortex lines, quantum hydrodynamics, helium gas

Bibliographic Information

Print publication date: 2007 Print ISBN-13: 9780199213603
Published to Oxford Scholarship Online: January 2008 DOI:10.1093/acprof:oso/9780199213603.001.0001


Affiliations are at time of print publication.

Armando Francesco Borghesani, author
Department of Physics, University of Padua