The interaction polarizability of two nitrogen molecules

The incremental polarizability which occurs when two nitrogen molecules interact has been calculated by the ab initio finite field SCF method. For the configurations studied the [5s, 4p, 1d] gaussian basis set gives a potential surface which is in qualitative agreement with other ab initio estimates. At separations around the energy minimum the interaction α is well represented by the dipole-induced dipole model. At closer separations the deviations from DID behaviour are qualitively similar to those which occur in rare gas diatoms.