Combination of the single-double coupled cluster and the configuration interaction methods; application to barium, lutetium and their ions

Abstract

A version of the method of accurate calculations for few valence-electron atoms which combines linearized single-double coupled cluster method with the configuration interaction technique is presented. The use of the method is illustrated by calculations of the energy levels for Ba, Ba${}^{+}$, Lu, Lu${}^{+}$ and Lu${}^{2+}$. Good agreement with experiment is demonstrated and comparison with previous version of the method (Safronova {\em et al}, PRA {\bf 80}, 012516 (2009)) is made.

7 pages, 5 tables, no figures

References in corpus (7)

• Development of a configuration-interaction + all-order method for atomic calculations
• Highly charged ions with E1, M1, and E2 transitions within laser range
• Atomic properties of superheavy elements No, Lr, and Rf
• Relativistic coupled-cluster single-double method applied to alkali-metal atoms
• Calculation of energy levels and transition amplitudes for barium and radium
• Fock space relativistic coupled-Cluster calculations of Two-Valence Atoms
• Implementation and Application of the Relativistic Equation of Motion Coupled-cluster Method for the Excited States of Closed-shell Atomic Systems

Cited by in corpus (13)

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• Ionization potentials and electron affinities of Rg, Cn, Nh, and Fl superheavy elements
• Effects of electrons on nuclear clock transition frequency in ${}^{229}$Th ions
• Electron structure of superheavy elements Uut, Fl and Uup ($Z$=113 to 115)
• High-accuracy optical clocks based on group 16-like highly charged ions
• Atomic clocks highly sensitive to the variation of the fine structure constant based on Hf II, Hf IV, and W VI ions
• All-order calculations of the spectra of superheavy elements E113 and E114
• Shift of nuclear clock transition frequency in ${}^{229}$Th ions due to hyperfine interaction
• Relativistic many-body calculation of energies, lifetimes, polarizabilities, blackbody radiative shift and hyperfine constants in Lu2+
• Barium-based Rydberg atom quantum technologies with long Rydberg coherence
• Prospects for optical clocks combining high sensitivity to new physics with insensitivity to perturbations; the case of Sb${}^{+}$, Au${}^{+}$, and Hg${}^{2+}$