Determination of the dipole polarizability of the alkali-metal negative ions

Abstract

We present electric dipole polarizabilities (${\alpha }_d$) of the alkali-metal negative ions, from H${}^{-}$ to Fr${}^{-}$, by employing four-component relativistic many-body methods. Differences in the results are shown by considering Dirac-Coulomb (DC) Hamiltonian, DC Hamiltonian with the Breit interaction, and DC Hamiltonian with the lower-order quantum electrodynamics interactions. At first, these interactions are included self-consistently in the Dirac-Hartree-Fock (DHF) method, and then electron correlation effects are incorporated over the DHF wave functions in the second-order many-body perturbation theory, random phase approximation and coupled-cluster (CC) theory. Roles of electron correlation effects and relativistic corrections are analyzed using the above many-body methods with size of the ions. We finally quote precise values of ${\alpha }_d$ of the above negative ions by estimating uncertainties to the CC results, and compare them with other calculations wherever available.

arXiv comment7 pages, 3 tables and 2 figures. Phys. Rev. A 102, 022820 (2020)

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Cited by in corpus (1)

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