Decay Properties of K-Vacancy States in Fe X-Fe XVII

Details Decay Properties of K-Vacancy States in Fe X-Fe XVII Decay Properties of K-Vacancy States in Fe X-Fe XVII

2003-06-16

arxiv.org/abs/astro-ph/0306320v2

Astron.Astrophys. 414 (2004) 377-388

Astronomy and Astrophysics

Astrophysics

13 pages, 4 figures. Submitted to A&A. Electronic Table 3-4 available at http://lheawww.gsfc.nasa.gov/users/palmeri/patrick.ht

Scientific paper

10.1051/0004-6361:20031621

We report extensive calculations of the decay properties of fine-structure K-vacancy levels in Fe X-Fe XVII. A large set of level energies, wavelengths, radiative and Auger rates, and fluorescence yields has been computed using three different standard atomic codes, namely Cowan's HFR, AUTOSTRUCTURE and the Breit-Pauli R-matrix package. This multi-code approach is used to the study the effects of core relaxation, configuration interaction and the Breit interaction, and enables the estimate of statistical accuracy ratings. The K-alpha and KLL Auger widths have been found to be nearly independent of both the outer-electron configuration and electron occupancy keeping a constant ratio of 1.53+/-0.06. By comparing with previous theoretical and measured wavelengths, the accuracy of the present set is determined to be within 2 mA. Also, the good agreement found between the different radiative and Auger data sets that have been computed allow us to propose with confidence an accuracy rating of 20% for the line fluorescence yields greater than 0.01. Emission and absorption spectral features are predicted finding good correlation with measurements in both laboratory and astrophysical plasmas.

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