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arXiv · 2601.21723

Applicability of the Dirac-Fock method combined with Core Polarization in calculations of alkali atoms

A. A. Bobylev·J. J. Lopez-Rodriguez·P. A. Kvasov·M. A. Reiter·D. A. Solovyev·T. A. Zalialiutdinov
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Abstract

In this work, we investigate the applicability of the core-polarization-corrected Dirac--Fock method, formulated within the framework of the local Dirac--Hartree--Fock (LDF) potential, for the accurate determination of static scalar and tensor electric dipole polarizabilities. This work presents theoretical values of blackbody-radiation-induced Stark shifts of atomic energy levels. The Dirac--Fock method augmented by core-polarization corrections is employed not only to evaluate these shifts but also to compute the Bethe logarithm for alkali-metal atoms. The results are critically compared with data available in the contemporary literature, and the strengths and limitations of the present approach are discussed.

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A. A. Bobylev, J. J. Lopez-Rodriguez, P. A. Kvasov, M. A. Reiter, D. A. Solovyev, T. A. Zalialiutdinov. 2026-01-29. Applicability of the Dirac-Fock method combined with Core Polarization in calculations of alkali atoms. https://doi.org/10.1103/cwhz-by5w

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