JETP Letters

, Volume 94, Issue 9, pp 714–718 | Cite as

Negative ions Ar, Kr, and Xe in superfluid helium

  • A. M. Dyugaev
  • P. D. Grigor’ev
  • E. V. LebedevaEmail author
Condensed Matter


The catalogue of negative ions in superfluid helium has been extended using the example of Ar, Kr, and Xe. Such objects cannot exist in vacuum, since the polarization attraction of an electron to the inert A atom is insufficient for the formation of the bound state A. However, these objects exist in helium as stable or metastable with a very long lifetime. The effect is due to the electron localization in liquid helium. If a mixture of excited A* atoms and electrons is prepared in the gas phase above liquid helium, the reaction A* + e = A* becomes possible for all atoms of the periodic table. Such charges can be immersed into liquid helium by the electric field. In this case, the radiative decay A* = A + e allowed in vacuum can be forbidden in liquid. This leads to the formation of the new unique objects A, which can exist in liquid helium but are absent in nature. The size of such charged formations has been determined and is close the radius of a usual electron bubble in helium.


JETP Letter Liquid Helium Superfluid Helium Unitarity Limit Electron Bubble 
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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  • A. M. Dyugaev
    • 1
    • 2
  • P. D. Grigor’ev
    • 1
  • E. V. Lebedeva
    • 3
    Email author
  1. 1.Landau Institute for Theoretical PhysicsRussian Academy of SciencesChernogolovka, Moscow regionRussia
  2. 2.Max-Planck-Insitut für Physik komplexer SystemeDresdenGermany
  3. 3.Institute of Solid State PhysicsRussian Academy of SciencesChernogolovka, Moscow regionRussia

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