Nuclear-size correction to the Lamb shift of one-electron atoms.

The nuclear-size effect on the one-loop self-energy and vacuum polarization is evaluated for the 1s, 2s, 3s, 2p1/2, and 2p3/2 states of hydrogen-like ions. The calculation is performed to all orders in the nuclear binding strength parameter Za. Detailed comparison is made with previous all-order calculations and calculations based on the expansion in the parameter Za. Extrapolation of the all-order numerical results obtained toward Z=1 provides results for the radiative nuclear-size effect on the hydrogen Lamb shift. [ABSTRACT FROM AUTHOR]