Correlated Monte Carlo wave functions for some cations and anions of the first row atoms

We applied the variational Monte Carlo method to the computation of the correlation energy for several first row cations (Li+ through Ne+) and anions (B− through F−). In addition, we obtained estimates of their ionization potentials and electron affinities. The ionization potentials differ from the experimental results on the average by 0.11 eV and the electron affinites differ on the average by 0.07 eV.