Energy eigenvalues and eigenfunctions of two-electron atoms

In a calculation of the energy eigenvalues and eigenfunctions of two-electron atoms, an attempt has been made to use a formula whereby most of the contributions from the repulsive term are directly taken into account. Using this formula the energy eigenvalues and eigenfunctions of the first eight 1S states of helium have been compiled. The results are about as good as those obtained by Hartree-Fock methods. (U.K.)