Statistical Method and Molecular Binding

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Abstract
The effect of the Weizsäcker correction on the interaction energy of two nitrogen atoms has been studied. By using an electron density function with two variational parameters, repulsion of the atoms is obtained. However, the repulsion energy is reduced from 12.0 atomic units to 4.4 atomic units when the Weizsäcker correction is included in the calculations. By comparing our results with those of Sheldon we may expect that in a higher approximation, e.g., using more variational parameters in the electron density function, it would be possible to get a binding.

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