A DETAILED THEORETICAL-ANALYSIS OF THE ELECTRON CORRELATION CONTRIBUTION TO THE STATIC DIPOLE HYPERPOLARIZABILITIES OF ATOMIC ANIONS - H-, C- AND F-

The static dipole hyperpolarizabilities of H-, C- and F- are calculated using large basis sets and highly correlated methods including configuration interaction, many-body perturbation theory and coupled-cluster schemes. A detailed analysis is given of the different contributions of the electron correlation effects to the dipole hyperpolarizability. Electron correlation effects are extremely large with sigificant contributions of high-order single and triple excitations.