Electrostatic potentials at the nucleus for isoelectronic series of light atomic ions using the QMC method in relation to DFT

The electrostatic potential at the nucleus is here calculated using the quantum Monte Carlo method. Both variational and diffusion-type data are presented for four different isoelectronic series of atomic ions, namely He, Li, Be and B. These results are then utilized to evaluate the ground-state energies of such atomic ions.