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Relativistic corrections to transition frequencies of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mtext>Fe</mml:mtext><mml:mtext> </mml:mtext><mml:mn mathsize="10pt">I</mml:mn></mml:mrow></mml:math>and search for variation of the fine-structure constant
Relativistic energy shifts of the low-energy levels of Fe have been calculated using the Dirac-Hartree-Fock and configuration interaction techniques. The results are to be used in the search for the space-time variation of the fine-structure constant in quasar absorption spectra. The values of the shifts are the largest among those …