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Title: Effects of Coster-Kronig transitions on electron-impact excitation rates for fluorinelike ions in their ground states

Abstract

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.

Authors:
; ;  [1]
  1. Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
142632
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
Physical Review A
Additional Journal Information:
Journal Volume: 49; Journal Issue: 3; Other Information: PBD: Mar 1994
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; ELECTRON-ION COLLISIONS; COSTER-KRONIG TRANSITIONS; MULTICHARGED IONS; ISOELECTRONIC ATOMS; FLUORINE; EXCITATION; CROSS SECTIONS; CORRELATIONS; RESONANCE; DISTORTED WAVE THEORY; RELATIVISTIC RANGE; GROUND STATES; ATOMIC NUMBER; ELECTRON TEMPERATURE; ASTROPHYSICS; PLASMA

Citation Formats

Chen, M.H., Reed, K.J., and Hazi, A.U.. Effects of Coster-Kronig transitions on electron-impact excitation rates for fluorinelike ions in their ground states. United States: N. p., 1994. Web. doi:10.1103/PhysRevA.49.1782.
Chen, M.H., Reed, K.J., & Hazi, A.U.. Effects of Coster-Kronig transitions on electron-impact excitation rates for fluorinelike ions in their ground states. United States. doi:10.1103/PhysRevA.49.1782.
Chen, M.H., Reed, K.J., and Hazi, A.U.. Tue . "Effects of Coster-Kronig transitions on electron-impact excitation rates for fluorinelike ions in their ground states". United States. doi:10.1103/PhysRevA.49.1782.
@article{osti_142632,
title = {Effects of Coster-Kronig transitions on electron-impact excitation rates for fluorinelike ions in their ground states},
author = {Chen, M.H. and Reed, K.J. and Hazi, A.U.},
abstractNote = {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.},
doi = {10.1103/PhysRevA.49.1782},
journal = {Physical Review A},
number = 3,
volume = 49,
place = {United States},
year = {1994},
month = {3}
}