We have calculated the lowest excitation energies and the static dipole polarizability of Li- as well as the electron affinity of Li using current quantum-chemical methods, including full CI. We have studied the convergence of the polarizability with the size of the orbital basis set. We find that electron correlation has a dramatic effect on the polarizability reducing it to roughly half its SCF value. MBPT calculations through fourth-order and perturbative propagator methods give an unsatisfactory description of the electron correlation whereas polarization propagator methods based on a coupled-cluster reference state give a polarizability in fair agreement with the full CI result. © 1988.
Canuto, S., Duch, W., Geertsen, J., Müller-Plathe, F., Oddershede, J., & Scuseria, G. E. (1988). The dipole polarizability of Li-. Chemical Physics Letters, 147(5), 435–442. https://doi.org/10.1016/0009-2614(88)85005-X