Absolute fully resolved (e,3e) cross sections for the double ionization of helium

Lahmam-Bennani, A.; Duguet, A.; Taouil, I.; Gaboriaud, M. N.; Avaldi, L.; Berakdar, J.; Kheifets, A.
February 2000
AIP Conference Proceedings;2000, Vol. 500 Issue 1, p431
Academic Journal
We have measured for the first time full sets of coplanar (e, 3e) angular distributions for double ionization of He, at an impact energy of ∼5 and ∼1 keV. Ejected electrons are detected with equal energies, 10 and 4 eV. Comparison is made with analog (γ, 2e) results, and deviations from the dipolar limit are pointed out. The data are also compared with two calculations, using either a four-body final-state wavefunction for the three electrons moving in the field of He[sup 2+], or the convergent close coupling method. © 2000 American Institute of Physics.


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