Electron-impact ionization of iron ions: Fe11+, Fe13+, and Fe15+

D. C. Gregory, L. J. Wang, F. W. Meyer, and K. Rinn
Phys. Rev. A 35, 3256 – Published 1 April 1987
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Abstract

Absolute cross-section measurements are reported for electron-impact ionization of iron ions with initial charges 11+, 13+, and 15+. The data extend from below the ionization thresholds to 1500 eV for Fe11+ and to 1400 eV for Fe13+, while the Fe15+ data cover the energy range from 630 to 1000 eV. Good agreement is found in each case between the measurements and detailed calculations which include the contributions due to the mechanism of inner-shell excitation-autoionization, but predicted significant enhancements of the Fe15+ cross section due to resonant-excitation double autoionization are not observed. Ionization rate coefficients and fitting parameters are presented based on the data.

  • Received 21 November 1986

DOI:https://doi.org/10.1103/PhysRevA.35.3256

©1987 American Physical Society

Authors & Affiliations

D. C. Gregory, L. J. Wang, and F. W. Meyer

  • Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6372

K. Rinn

  • Joint Institute for Laboratory Astrophysics, Boulder, Colorado 80309-0440 and Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6372

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Issue

Vol. 35, Iss. 8 — April 1987

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