Direct perturbation theory of relativistic effects for eplicity correlated wave functions: The He

Ottschofski, Edgar; Kutzelnigg, Werner
April 1997
Journal of Chemical Physics;4/22/1997, Vol. 106 Issue 16, p6634
Academic Journal
Formulates the direct perturbation theory of relativistic effects for two-electron states described by a Dirac-Coulomb or a Dirac-Gaunt Hamiltonian. Recapitulation of direct perturbation theory; Results for helium-like ions in conventional expansion; Results for isoelectronic series from combination of R12 method with direct perturbation theory.


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