Effects of Coster-Kronig transitions on electron-impact excitation rates for fluorinelike ions in their ground states
- Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 (United States)
The contributions of Coster-Kronig resonances to the electron-impact excitation rate coefficients have been calculated for six F-like ions with {ital Z}=26, 34, 42, 47, 54, and 63. The calculations are carried out using the relativistic distorted-wave approximation and the multiconfiguration Dirac-Fock model. We found that resonance excitation via Coster-Kronig transitions is the dominant excitation mechanism at low temperatures for {ital Z}{le}34 and is as important as the direct excitation for heavier ions. In addition, we found that the effects of relativity can reduce the rate coefficients by more than an order of magnitude at electron temperatures {ital T}{lt}100 eV.
- Research Organization:
- Lawrence Livermore National Laboratory
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 142632
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 3 Vol. 49; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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