Relativistic extended coupled cluster method for magnetic hyperfine structure constant

Abstract

This article deals with the general implementation of 4-component spinor relativistic extended coupled cluster (ECC) method to calculate first order property of atoms and molecules in their open-shell ground state configuration. The implemented relativistic ECC is employed to calculate hyperfine structure (HFS) constant of alkali metals (Li, Na, K, Rb and Cs), singly charged alkaline earth metal atoms (Be+, Mg+, Ca+ and Sr+) and molecules (BeH, MgF and CaH). We have compared our ECC results with the calculations based on restricted active space configuration interaction (RAS-CI) method. Our results are in better agreement with the available experimental values than those of the RAS-CI values.

14 pages, 6 figures

References in corpus (2)

• Relativistic many-body calculations of energy levels, hyperfine constants, electric-dipole matrix elements and static polarizabilities for alkali-metal atoms
• Hyperfine structure of Li and Be^+

Cited by in corpus (4)

• Relativistic coupled-cluster study of RaF as a candidate for parity and time reversal violating interaction
• Hyperfine structure constants on the relativistic coupled cluster level with associated uncertainties
• Relativistic coupled-cluster study of BaF in search of $\mathcal{C}\mathcal{P}$ violation
• Calculation of the magnetic hyperfine structure constant of alkali metals and alkaline earth metal ions using the relativistic coupled-cluster method