Electron Correlations and Classification Schemes for Intershell Doubly Excited States

摘要

High-lying intershell doubly excited states of He and H~- are studied and energies and intrinsic characteristics of their wave functions are reported. Results for energies of ~3S and ~1P~e doubly excited states associated with the hydrogenic manifold up to N = 20 are presented and compared to available data from the literature. The classification of these doubly excited states by approximate quantum numbers is reexamined.