Stuttgart 2012 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 21: Poster: Precision spectroscopy of atoms and ions

A 21.8: Poster

Dienstag, 13. März 2012, 16:30–19:00, Poster.V

High-precision calculation of the structure of highly charged Fe ions — •Natalia Oreshkina, Zoltan Harman, and Christoph H. Keitel — Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg, Germany

We present accurate theoretical values of the visible and x-ray transition energies in highly charged ₂₆⁵⁶Fe¹³⁺ to ₂₆⁵⁶Fe¹⁶⁺ ions. Relativistic electron correlation calculations are performed within the framework of the configuration interaction method with Dirac-Fock-Sturmian basis functions. For the 3p_3/2 → 3p_1/2 green magnetic dipole transition in ₂₆⁵⁶Fe¹³⁺, we take into account QED effects by employing an effective screening potential. High-precision calculations of these systems may be important for astronomical research, and in investigations towards the time variation of the fine-structure constant.