Abstract
Multiconfiguration relativistic random-phase approximation has been developed to describe excitations of an atomic system having a multiconfiguration ground state. The response of such an atom to an imposed harmonic perturbation is determined by applying the time-dependent variational principle to a multiconfiguration wave function constructed from Dirac orbitais. Terms in the wave function independent of the external field lead to the multiconfiguration Dirac-Fock description of the ground state. Terms proportional to the external field lead to a multiconfiguration generalization of the relativistic random-phase approximation. Application of the multiconfiguration relativistic random-phase approximation theory to resonance transitions in Mg- and Zn-like ions are presented.
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