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Electron impact ionization of ground-state and metastable Li+ ions

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Authors
Borovik, A.
Muller, A.
Schippers, S.
Bray, Igor
Fursa, Dmitry
Date
2009
Type
Journal Article

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Borovik Jr, A and Muller, A and Schippers, S and Bray, I and Fursa, D V. 2009. Electron impact ionization of ground-state and metastable Li+ ions. Journal of Physics B. 42 (2): pp. 025203.
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Journal of Physics B
DOI
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Faculty
Faculty of Science and Computing
School of Science and Computing
Department of Imaging and Applied Physics
Faculty of Science and Engineering
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© Institute of Physics (the “Institute”) and IOP Publishing 2010.

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Abstract

Direct ionization of ground-state Li+(1s2 1S0) and metastable Li+(1s2s 3S1) ions by electron impact has been studied in the energy range from threshold to 1000 eV using state-of-the-art experimental and theoretical approaches. Absolute cross sections obtained by crossing a beam of Li+(1s2) ions with a beam of electrons and results of convergent close coupling (CCC) calculations agree within experimental error bars of approximately 10%. Mixed beams of Li+(1s2) and Li+(1s2s 3S) ions were also prepared and apparent cross sections were measured. Good agreement with CCC theory is obtained assuming suitable fractions of metastable ions in the parent beam.