(e,3e)on Helium at Low Impact Energy: The Strongly Correlated Three-Electron Continuum | Zendy

M. Dürr | Zendy; Alexander Dorn | Zendy; J. Ullrich | Zendy; Sheng Cao | Zendy; A. Czasch | Zendy; A. S. Kheifets | Zendy; J. Götz | Zendy; J S Briggs | Zendy

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(e,3e)on Helium at Low Impact Energy: The Strongly Correlated Three-Electron Continuum

Author(s) -

M. Dürr,

Alexander Dorn,

J. Ullrich,

Sheng Cao,

A. Czasch,

A. S. Kheifets,

J. Götz,

J S Briggs

Publication year - 2007

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.98.193201

Subject(s) - ionization , physics , electron , atomic physics , electron capture , energy (signal processing) , ion , nuclear physics , quantum mechanics

Double ionization of the helium atom by slow electron impact (E(0)=106 eV) is studied in a kinematically complete experiment. Because of a low excess energy E(exc)=27 eV above the double ionization threshold, a strongly correlated three-electron continuum is realized. This is demonstrated by measuring and calculating the fully differential cross sections for equal energy sharing of the final-state electrons. While the electron emission is dominated by a strong Coulomb repulsion, also signatures of more complex dynamics of the full four-body system are identified.

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