Ionization processes in small quasimolecules: He{sub 2}{sup 2+} (He{sup 2+}+ He)

Journal Article · Thu Sep 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.032706· OSTI ID:22068708

Ogurtsov, G N; Mikoushkin, V M ^[1]; Ovchinnikov, S Yu ^[1]; Macek, J H ^[2]

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1. Ioffe Physico-Technical Institute, 194021 St. Petersburg (Russian Federation)
2. Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1501 (United States)

The energy spectra of electrons ejected in He{sup 2+}-He collisions were measured in the ion energy range 6-30 keV. Theoretical analysis of the ionization mechanisms has been performed on the basis of the advanced adiabatic approximation for one-electron processes and perturbation theory for two-electron processes. The ionization channel 2p{sigma}{sup 2}{yields} 1s{sigma}nd{sigma}{yields} 1s{sigma}{epsilon}d{sigma} has been revealed, which makes a considerable contribution to the ionization cross section in the keV ion energy range.

• OSTI ID: 22068708
• Journal Information: Physical Review. A, Vol. 84, Issue 3; Other Information: (c) 2011 American Institute of Physics; Country of input: Syrian Arab Republic; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ADIABATIC APPROXIMATION
COLLISIONS
CROSS SECTIONS
ELECTRONS
ENERGY SPECTRA
HELIUM IONS
IONIZATION
KEV RANGE
PERTURBATION THEORY