Energy of Interaction between Two Hydrogen Atoms by the Gaussian-Type Functions

Abstract
The interaction of two hydrogen atoms in their ground states is investigated with a Hirschfelder—Linnett type of wavefunction in which the exponentials are replaced by Gaussian‐type functions. It is found that these functions do not properly describe the long‐range interaction, although the same functions reasonably approximate the molecular energy near the equilibrium separation. The explicit formulas for the atomic integrals are tabulated.