Generalized diatomics-in-molecules method for polyatomic anions

The diatomics-in-molecules (DIM) method for the construction of polyatomic potential-energy functions was generalized to obtain a description of potential-energy functions of both quasistationary and bound states of polyatomic anions. The formulation was based on the combination of the projection-operator approach of scattering theory and DIM method. The polyatomic projection-operator provided the basis for a rigorous treatment of the nuclear dynamics in short-lived electron-molecule collision complexes and ion-molecule collisions.