Unified and Self-Consistent Treatment of Photoionization and Recombination: Fe XXI, Ne VIII, Ne IX

Details Unified and Self-Consistent Treatment of Photoionization and Recombination: Fe XXI, Ne VIII, Ne IX Unified and Self-Consistent Treatment of Photoionization and Recombination: Fe XXI, Ne VIII, Ne IX

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aps..dmp.c3009n&link_type=abstract

American Physical Society, 36th Meeting of the Division of Atomic, Molecular and Optical Physics, May 17-21, 2005, abstract #C3.

Physics

Scientific paper

Photoionization models for astrophysical plasmas require a self-consistent treatment of ionization balance between photoionization and electron-ion recombination. We will present new results using the unified method for electron-ion recombination which enables (i) treatment of both radiative and di-electronic recombination (RR and DR) in an ab initio manner, (ii) self-consistent calculations for photoionization and recombination using the same wavefunction expansion, (iii) level-specific recombination rate coefficients for a large number of bound levels. The method provides a single and accurate total (e-ion) recombination rate coefficient, to be computed at all temperatures of interest in astrophysical and laboratory plasmas. Total recombination rates from the unified method will be presented for Fe XXI. Importance of channel coupling through relativistic effects, not allowed in non-relativistic LS coupling, at very low temperature for this ion will be shown as seen in the experiment. Latest results for highly charged Li- and He-like ions of interest in X-ray astronomy will be presented for Ne VIII-IX and Mg X-XI.

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