Abstract
The role of the continuum and of correlation in the multiconfiguration Dirac-Fock calculation of nondiagonal one-electron operators is described. Because of its importance and symmetry which emphasize both effects, we study the relativistic transition in two-electron ions. It is shown that both contributions have the same magnitude, and must be included even at low . These contributions improve significantly the agreement between theory and experiment at all , reducing the disagreement for Nb from to times the experimental error.
- Received 30 October 1995
DOI:https://doi.org/10.1103/PhysRevLett.77.3323
©1996 American Physical Society