Atomic Data for High-Energy Configurations in Fe XVII-XXIII

Details Atomic Data for High-Energy Configurations in Fe XVII-XXIII Atomic Data for High-Energy Configurations in Fe XVII-XXIII

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apj...640.1171l&link_type=abstract

The Astrophysical Journal, Volume 640, Issue 2, pp. 1171-1179.

Astronomy and Astrophysics

Astronomy

14

Atomic Data, Plasmas

Scientific paper

In the present work we calculate energy levels, oscillator strengths, A-values, and electron-ion excitation collision strengths for high-energy configurations for the iron ions Fe XVII to Fe XXIII. Collision rate coefficients are calculated using the distorted-wave approximation; the contribution of resonant excitation is taken into account by using the isolated-resonance approximation for configurations with principal quantum numbers n=2 and 3. Results are compared with R-matrix calculations available in the literature for the lowest configurations; our results are the first ever published for highly excited configurations with n>=4 for most ions. Synthetic spectra are calculated from the resulting rate coefficients and compared to available spectral codes. Some applications of the results of the present calculation to solar physics are discussed. These data will be part of the next version of the CHIANTI database.

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