Abstract
In a recent study of angular correlation of electrons in the ground state of the helium atom was examined using both configuration interaction (CI) and Hylleraas wavefunctions. It was concluded that little reliance should be placed on properties involving angular correlation which are derived from CI wavefunctions. In contradiction with this conclusion, we have observed a rapid convergence of the natural orbital CI expansion to the correct angular correlation behavior of the Kinoshita helim atom wavefunction.
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