https://doi.org/10.1007/s100530170282
Energies and electron correlation effects in two-electron doubly excited (n l)2 states
Department of physics, University Cheikh Anta Diop, Dakar, Senegal
Corresponding author: a wague@ucad.refer.sn
Received:
30
March
2000
Revised:
4
July
2000
Published online: 15 January 2001
Energies of singlet doubly excited states 
1D, 
1G, 
1I of He isoelectronic series are calculated in the framework of the variational method by using
Hylleraas-type wave functions and a real Hamiltonian. The results obtained show quantitatively the importance of electron correlation effects in the doubly excited states and they are in good agreement with some experimental data and other theoretical results.
PACS: 31.25.Jf – Electron-correlation calculations for atoms and ions: excited states
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
