Abstract
The electron-impact single ionization of low-charged Mo ions is studied both experimentally and theoretically. The absolute cross sections for ${\mathrm{Mo}}^{\mathit{q}+}$ ions in charge states q=1--8 are measured using a crossed-beam technique. Distorted-wave calculations are made including both direct ionization and excitation-autoionization contributions. For ions in charge states q=6--8, the measured cross sections are in good agreement with calculations involving only the lowest-energy metastable configuration. For ions in charge states q=3--8, the good agreement between experiment and theory confirms the dominant role played by excitation-autoionization contributions to the total ionization cross section. \textcopyright{} 1996 The American Physical Society.
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