An. Artemyev et al., RELATIVISTIC NUCLEAR RECOIL CORRECTIONS TO THE ENERGY-LEVELS OF HYDROGENLIKE AND HIGH-Z LITHIUM-LIKE ATOMS IN ALL ORDERS IN ALPHA-Z, Physical review. A, 52(3), 1995, pp. 1884-1894
The relativistic nuclear recoil corrections to the energy levels of lo
w-lying states of hydrogenlike and high-Z lithiumlike atoms in all ord
ers in alpha Z are calculated. The calculations are carried out using
the B-spline method for the Dirac equation. For low Z the results of t
he calculation are in good agreement with the alpha Z-expansion result
s. It is found that the nuclear recoil contribution, in addition to Sa
lpeter's contribution, to the Lamb shift (n = 2) of hydrogen is -1.32(
6) kHz. The total nuclear recoil correction to the energy of the (1s)(
2)2p1/2-(1s)(2)2s transition in lithiumlike uranium constitutes -0.07
eV.