We present theoretical, differential, and total cross sections for electron impact excitation of the lowest autoionizing levels of various lithiumlike ions (viz., Be+, B2+, C3+, O5+, and Ne7+). For these ions, the autoionizing level of interest results from excitation of an inner-shell electron. A distorted-wave Born approximation (with exchange) is used for the calculation. The present results are compared with previous theoretical calculations and it is concluded that the Coulomb-Born approach is unreliable, particularly near threshold.
R. C. Srivastava and D. H. Madison, "Excitation of the Lowest Autoionizing Levels in Lithiumlike Ions by Electron Impact," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 38, no. 10, pp. 5419-5422, American Physical Society (APS), Nov 1988.
The definitive version is available at https://doi.org/10.1103/PhysRevA.38.5419
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