Relativistic coupled-cluster theory of quadrupole moments and hyperfine structure constants of the 5d- states in Ba


The narrow optical frequency resonances of the 6s 2S1/2 → 5d 2D3/2 and 6s 2S1/2 → 5d 2D5/2 forbidden transitions in Ba have been proposed as suitable frequencies for a new optical frequency standard. The major sources of errors in measurements of singly ionized systems are due to the quadratic Zeeman and electric quadrupole shifts. We report here the most… (More)


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