Abstract
The formalism of the pair electron distribution function has been used to study total and local interelectronic repulsion for the ground state of helium. A discussion of the distances that contribute most to electron repulsion is made, and plots of the local interelectronic repulsion are given for Hartree-Fock, explicitly correlated and configuration interaction wavefunctions, showing some interesting qualitative differences. A cusp effect in the limit r12=0 arises for the interelectronic repulsion distribution computed with the explicitly correlated wavefunction, but no cusp is observed for Hartree-Fock and configuration interaction wavefunctions.
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