Calculation of the magnetic hyperfine structure constant of alkali metals and alkaline earth metal ions using the relativistic coupled-cluster method

Abstract

The Z-vector method in the relativistic coupled-cluster framework is used to calculate magnetic hyperfine structure constant ($A_J$) of alkali metals and singly charged alkaline earth metals in their ground state electronic configuration. The Z-vector results are in very good agreement with the experiment. The $A_J$ values of Li, Na, K, Rb, Cs, Be${}^{+}$, Mg${}^{+}$, Ca${}^{+}$, and Sr${}^{+}$ obtained in the Z-vector method are compared with the extended coupled-cluster results taken from Phys. Rev. A 91, 022512 (2015). The same basis and cutoff are used for the comparison purpose. The comparison shows that Z-vector method with the singles and double approximation can produce more precise wavefunction in the nuclear region than the ECC method.

6 pages, 1 figure

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Cited by in corpus (1)

• Hyperfine structure constants on the relativistic coupled cluster level with associated uncertainties