  The isospin dependence of the spin-orbit potential is investigated for an
effective Skyrme like energy-functional suitable for density-dependent
Hartree-Fock calculations. The magnitude of the isospin dependence is obtained
from a fit to experimental data on finite spherical nuclei. It is found to be
close to that of relativistic Hartree models. Consequently the anomalous kink
in the isotope shifts of Pb nuclei is well reproduced.
