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

Abstract

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.

Authors:
;  [1];  [1];  [2];  [2];  [3];  [2]
  1. Ioffe Physico-Technical Institute, 194021 St. Petersburg (Russian Federation)
  2. (United States)
  3. Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1501 (United States)
Publication Date:
OSTI Identifier:
22068708
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: Syrian Arab Republic; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ADIABATIC APPROXIMATION; COLLISIONS; CROSS SECTIONS; ELECTRONS; ENERGY SPECTRA; HELIUM IONS; IONIZATION; KEV RANGE; PERTURBATION THEORY

Citation Formats

Ogurtsov, G. N., Mikoushkin, V. M., Ovchinnikov, S. Yu., Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1501, Oak Ridge National Laboratory, P.O. Box 2009, Oak Ridge, Tennessee 37831, Macek, J. H., and Oak Ridge National Laboratory, P.O. Box 2009, Oak Ridge, Tennessee 37831. Ionization processes in small quasimolecules: He{sub 2}{sup 2+} (He{sup 2+}+ He). United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.032706.
Ogurtsov, G. N., Mikoushkin, V. M., Ovchinnikov, S. Yu., Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1501, Oak Ridge National Laboratory, P.O. Box 2009, Oak Ridge, Tennessee 37831, Macek, J. H., & Oak Ridge National Laboratory, P.O. Box 2009, Oak Ridge, Tennessee 37831. Ionization processes in small quasimolecules: He{sub 2}{sup 2+} (He{sup 2+}+ He). United States. doi:10.1103/PHYSREVA.84.032706.
Ogurtsov, G. N., Mikoushkin, V. M., Ovchinnikov, S. Yu., Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1501, Oak Ridge National Laboratory, P.O. Box 2009, Oak Ridge, Tennessee 37831, Macek, J. H., and Oak Ridge National Laboratory, P.O. Box 2009, Oak Ridge, Tennessee 37831. Thu . "Ionization processes in small quasimolecules: He{sub 2}{sup 2+} (He{sup 2+}+ He)". United States. doi:10.1103/PHYSREVA.84.032706.
@article{osti_22068708,
title = {Ionization processes in small quasimolecules: He{sub 2}{sup 2+} (He{sup 2+}+ He)},
author = {Ogurtsov, G. N. and Mikoushkin, V. M. and Ovchinnikov, S. Yu. and Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1501 and Oak Ridge National Laboratory, P.O. Box 2009, Oak Ridge, Tennessee 37831 and Macek, J. H. and Oak Ridge National Laboratory, P.O. Box 2009, Oak Ridge, Tennessee 37831},
abstractNote = {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.},
doi = {10.1103/PHYSREVA.84.032706},
journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}