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In this paper we calculated the relativistic corrections to transitionfrequencies (q factors) of Fe I for the transitions from the even- andodd-parity states to the ground state. We also carried out isotope shiftcalculations in Fe I and Fe II. To the best of our knowledge, the isotope shiftin Fe I was calculated for the first time.

Transition frequency shifts with fine-structure constant variation for Fe I. Isotope shift calculations in Fe I and Fe II