Negative ions in liquid helium | Zendy

A. G. Khrapak | Zendy; Walter Schmidt | Zendy

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Negative ions in liquid helium

Author(s) -

A. G. Khrapak,

Walter Schmidt

Publication year - 2011

Publication title -

low temperature physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.356

H-Index - 43

eISSN - 1090-6517

pISSN - 1063-777X

DOI - 10.1063/1.3599656

Subject(s) - ion , helium , atomic physics , superfluid helium 4 , liquid helium , materials science , radius , cluster (spacecraft) , impurity , molecule , halogen , electron , plasma , physics , chemistry , nuclear physics , alkyl , computer security , organic chemistry , computer science , programming language , quantum mechanics

The structure of negative ions in liquid 4He is analyzed. The possibility of cluster or bubble formation around impurity ions of both signs is discussed. It is shown that in superfluid helium, bubbles form around negative alkaline earth metal ions and clusters form around halogen ions. The nature of "fast" and "exotic" negative ions is also discussed. It is assumed that "fast" ions are negative ions of helium excimer molecules localized inside bubbles. "Exotic" ions are stable negative impurity ions, which are always present in small amounts in gas discharge plasmas. Bubbles or clusters with radii smaller the radius of electron bubbles develop around these ions.

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