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Importance of configuration interaction for accurate atomic data : Fluorescence yields of K-shell vacancy, lithium-like ions

Gorczyca, T. W. and Dumitriu, I. and Hasoglu, M.F. and Korista, K.T. and Badnell, N.R. and Savin, D.W. and Manson, S.T. (2006) Importance of configuration interaction for accurate atomic data : Fluorescence yields of K-shell vacancy, lithium-like ions. Astrophysical Journal, 638 (2). L121-L124. ISSN 0004-637X

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Abstract

We demonstrate that the inclusion of configuration interaction (CI) results in significant values for the K-shell fluorescence yields of Li-like ions, which are zero in a single-configuration approach. Modeling codes for simulating supernova remnants under nonequilibrium ionization conditions or photoionized plasmas such as active galactic nuclei or X-ray binaries need to be updated accordingly. A two-parameter fitting formula for the fluorescence yields has been developed. The generality of important CI effects on atomic calculations is pointed out.