Abstract
Use of relativistic many-body perturbation theory is made to calculate the hyperfine splitting of the ground 62S1/2 state in 197Au (I=3/2). The calculated splitting of 6068 MHz is in good agreement with the experimental value of 6099.320184(13) MHz determined by an atomic beam magnetic resonance technique. Electron charge densities at the nuclear surface corresponding to various configurations of 197Au are calculated in an ab initio way by numerically solving the relativistic Dirac-Fock equations incorporating the nuclear charge distribution. The electronic factor relevant to the volume isotope shift for the resonance transition 6s2S1/2-6p2P1/2 in gold is also calculated and compared with other available results.
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