Correlated electron detachment in H⁻-He collisions

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G. N. Ogurtsov and V. M. Mikoushkin
A. F. Ioffe Physico-Technical Institute, St. Petersburg 194021, Russia

S. Yu. Ovchinnikov and J. H. Macek
Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1200, USA

Received 7 November 2003; published 25 October 2006

Experimentaland theoretical studies of the energy spectra of electrons ejectedin H⁻-He collisions have been performed. Comparison of calculations usingthe Sturmian and advanced adiabatic theories with experimental data revealsthe existence of a correlated electron detachment mechanism, which yieldsthe main contribution to formation of the high-energy part ofthe ejected electron energy distribution. This mechanism is associated withdynamical energy transfer to the loosely bound 1s electron ofH⁻ in the course of superpromotion of the inner 1selectron.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.74.042720
DOI:	10.1103/PhysRevA.74.042720
PACS:	34.50.Fa 34.50.Fa Electronic excitation and ionization of atoms including beam–foil excitation and ionization YEAR: 2006
KEYWORDS:	hydrogen ions, negative ions, helium neutral atoms, atom-ion collisions, electron detachment

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