Isotopic effects for the ground 1 1S(L=0) states in the light two-electron ions

The total energies and various bound state properties are determined to very high accuracy for the ground 1 S-1(L=0) states in some light two-electron ions, including the Li+, Be2+, B3+, and C4+ ions. The corrections due to the finite nuclear masses and lowest order QED corrections (similar to alpha(3)) are considered/computed for each of these ions. In particular, the specific mass shift is determined for each of the Li+, Be2+, B3+, and C4+ ions. We also discuss the field shift related to the extended nuclear charge distribution. (c) 2006 American Institute of Physics.