Abstract

Rotation-electronic interactions between states of the 4 f 6s configuration of CeO, mediated by the operator -B(R)(Ĵ+·Ĵ−a + Ĵ−·Ĵ+a), have been calculated. Second-order perturbation theory was used to account for the effect of heterogeneous interactions on the rotation constants within a single configuration. Eigenvectors from a ligand field theory calculation were used to evaluate these interactions. The results demonstrate the capability of the ligand field model to predict electronic-rotational interactions, and they illustrate the value of these interactions for uncovering the atomic-ion quantum numbers that are not readily determined for molecules in the strong spin-orbit coupling limit [Hund′s case (c)].

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