Polarizability functions of diatomic homonuclear molecules: Semiempirical approach

A semiempirical method is discussed to construct the polarizability functions for a diatomic homonuclear molecule as a piecewise-continuous function that exhibits physically correct behavior at small and large internuclear distances and agrees with the polarizability function near the nuclear equilibrium position of the molecule. The method is applied to calculate the polarizability functions of N₂ and O₂ molecules in the range of internuclear distances (0, ∞).