from the interval $r\le a_B$. While for $6s$ most of the exchange relaxation shift comes from $r\le a_B$, for $6p$ and $5d$ the largest part of the exchange relaxation shift comes from $r> a_B$.

It is interesting to see how Uehling corrections to individual orbitals of the core propagate in the self-consistent solution of the corrected Hartree-Fock potential and appear finally in the shift in the valence binding energies. In Table \[tab:deltaV\] in the columns $3-10$, we consider such shifts. In the columns under $1s$ through to $5s$, we present the shifts to the valence levels that result by switching on the Uehling correction to these core $s$ orbitals individually. (Note that in this case the potentials for all $s$ orbitals are not the same, resulting in orbitals that are slightly non-orthogonal.)

In columns $8-10$ of Table \[tab:deltaV\] we show the contributions to the valence shifts that result by including the Uehling potential for all core $s$ orbitals only, then for all core $p_{1/2}$ orbitals only, and then for all core $p_{3/2}$ orbitals. As we would expect, Uehling corrections to the core $s$ levels give most of the valence shift, though consideration of the contributions from the $p$ orbitals is 