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Electron-electron correlation of 3Se states of the helium atom.

A nonadiabatic variational procedure is used to diagonalize the Hamiltonian of the helium atom to obtain the /sup 3/S/sup e/ states. A partial-wave analysis of the wave functions has been made. The one-body densities and the shape densities have been investigated. Detailed information on electron-electron correlation has been obtained. The K-classification scheme has been recovered. The strong radial-angular correlation regions together with the associated twin nodes have been discovered.