Indirect processes in electron-impact ionization of Xe sup 43

Relativistic-distorted-wave methods have been used to calculate electron-impact-ionization cross sections for Xe{sup 43+}. Cross sections were calculated for direct ionization of the 3{ital s} electron and the {ital n}=2 inner-shell electrons. Electron-impact-excitation cross sections were calculate...

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Veröffentlicht in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 1990-11, Vol.42:9
Hauptverfasser: Reed, K.J., Chen, M.H., Moores, D.L.
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Sprache:eng
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Zusammenfassung:Relativistic-distorted-wave methods have been used to calculate electron-impact-ionization cross sections for Xe{sup 43+}. Cross sections were calculated for direct ionization of the 3{ital s} electron and the {ital n}=2 inner-shell electrons. Electron-impact-excitation cross sections were calculated for transitions from the {ital n}=2 subshells to the {ital n}=3 and 4 levels of the ion. Detailed Auger and radiative rates were calculated for the intermediate excited states and these were used to determine the excitation-autoionization and resonant-excitation double-autoionization contributions to the ionization cross section. Our results are in excellent agreement with reported experimental results for incident electron energies between 8 and 15 keV. Recent measurements using the electron-beam ion trap are in qualitative agreement with our results for energies between 4 and 8 keV.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.42.5315