Advances over the last twenty years are reported, with the emphasis on describing
correlations through the distribution of an electron pair's wavefunction in its configuration …

Inaccuracies in the atomic shell model due to the neglect of electron correlation and some
relativistic effects are examined. The asymptotic behavior of atomic valence electrons is …

Publisher Summary This chapter discusses a method of calculating the position and width of
each doubly excited state of atoms and the approximate selection rules for different …

Investigations of the exactly solvable excitation spectra of two-electron quantum dots with a
parabolic confinement, for different values of the parameter RW expressing the relative …

We investigate whether the intrashell portion of the double-excitation spectrum of the helium
atom may be interpreted in terms of collective rotational and bending vibrational motion …

It is safe to say that the modern language (if not most of our understanding) of the electronic
structure of atoms and molecules is derived from the shell structure of representative one …

We compute new estimates of energy levels of doubly excited states with two electrons in
the same shell, for all principal quantum numbers N≤ 5 and angular momentum values 0≤ …

Using attosecond light pulses to doubly ionize a two-electron wave packet of helium, we
showed that the time-resolved correlated motion of the two electrons can be probed by …

The authors propose a novel" supermultiplet" classification of doubly excited states for two
electrons in the same shell, constructed from more limited O (4) multiplets of earlier …

By measuring the yield of metastable atoms resulting from electron-impact excitation of
helium, in the range of incident electron energy from 19.8 to 24.6 eV, the authors have …