Abstract
The behavior of electron energy levels in hydrogen-like atoms is studied while taking into account the nonperturbative interaction between the radiative component of the magnetic moment of a free electron Δg free and the Coulomb field of an atomic nucleus with charge Z, including those with Z > 137. It is shown that for Zα ≪ 1 the energy-level shift is rather effectively determined through the matrix elements of the corresponding Dirac-Pauli operator with relativistic Coulomb wave functions. At the same time, for superheavy nuclei with Z ∼ 170, this shift, generated by Δg free, is genuinely nonperturbative, behaves like ∼Z 5 near the threshold of negative continuum, exceeds all the estimates of radiative corrections coming from vacuum polarization and electron self-energy known so far, and turns out to be at least of the same order as the effects of nuclear charge screening by filled electron shells.
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Original Russian Text © K.A. Sveshnikov, D.I. Khomovskii, 2013, published in Pis’ma v Zhurnal Fizika Elementarnykh Chastits i Atomnogo Yadra, 2013, No. 2(179), pp. 187–206.
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Sveshnikov, K.A., Khomovskii, D.I. High Z effects in accounting for radiative component of the electron magnetic moment in hydrogen-like atoms. Phys. Part. Nuclei Lett. 10, 119–131 (2013). https://doi.org/10.1134/S1547477113020155
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DOI: https://doi.org/10.1134/S1547477113020155