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The low-lying n(=3,4,5)d $^2D_{5/2}$ states alkaline earth ions are of vital importance in a number of different physical applications. The hyperfine structure constants of these states are characterized by unusually strong electron correlation effects. Relativistic coupled-cluster theory has been employed to carry out {\it ab initio} calculations of these constants. The role of the all order core-polarization effects was found to be decisive in obtaining good agreement of the results of our calculations with accurate measurements. The present work is an apt demonstration of the power of the coupled-cluster method to cope with strongly interacting configurations.

physical review. a, atomic, molecular, and optical physics/physical review, a, atomic, molecular, and optical physics

Enhanced role of electron correlation in the hyperfine interactions in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>D</mml:mi><mml:mrow><mml:mn>5</mml:mn><mml:mo>∕</mml:mo><mml:mn>2</mml:mn></mml:mrow><mml:none /><mml:mprescripts /><mml:none /><mml:mn>2</mml:mn></mml:mmultiscripts></mml:math>states in alkaline-earth-metal ions

Enhanced role of electron correlation in the hyperfine interactions inD5∕22states in alkaline-earth-metal ions