Recoil correction to the ground state energy of hydrogenlike atoms

The recoil correction to the ground state energy of hydrogenlike atoms is calculated to all orders in αZ in the range Z = 1–110. The nuclear size corrections to the recoil effect are partially taken into account. In the case of hydrogen, the relativistic recoil correction beyond the Salpeter contribution and the nonrelativistic nuclear size correction to the recoil effect, amounts to –7.2(2) kHz. The total recoil correction to the ground state energy in hydrogenlike uranium (238U91+) constitutes 0.46 eV. Present address: Department of Physics, St.Petersburg State University, Oulianovskaya 1, Petrodvorets, St.Petersburg 198904, Russia 2 Permanent address: Institute for High Performance Computing and Data Bases, Fontanka 118, St.Petersburg 198005, Russia