Journal of Chemical Physics, Vol.104, No.15, 5892-5897, 1996
Density-Functional Calculation for Doubly-Excited Autoionizing States of Helium Atom
Several doubly excited autoionizing states of He have been calculated within the density functional framework by employing the Harbola-Sahni exchange potential. Correlation effects have been incorporated in the total effective potential through a Wigner-type correlation potential. Although continuum functions are not explicitly incorporated into these calculations, resonance energies of these states are in satisfactory agreement with other theoretical results.
Keywords:N HYDROGENIC THRESHOLDS;ELECTRON-IMPACT;2-ELECTRON ATOMS;RESONANCE STATES;ENERGY-LEVELS;HE;LI+;1SE;SPECTROSCOPY;IONIZATION