Summary
Radiative corrections to the binding energies of electrons in the field of a nucleus have been the subject of experimental and theoretical investigations since the discovery of the Lamb shift more than 50 years ago. In order to disen tangle radiative corrections and many-body effects, most of the efforts have been concentrated on hydrogen- and helium-like ions. Ions of high nuclear charge Z are of particular interest because the radiative corrections approximately increase as ~Z 4/n 3, whereas the binding energies grow only as ~Z 2/n 2. Therefore, QED effects are the stronger the larger the nuclear charge Z is. New experimental pos sibilities for the high-Z region have opened up with a new generation of heavy-ion accelerators and especially of heavy-ion storage rings like the ESR at the GSI Darmstadt. We will present the basic ideas of the experiments performed so far and of the experiments which are starting at the present time. Finally, we will discuss the present experimental results and compare them to theoretical calculations.
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Liesen, D., Beyer, H.F. (1999). Ground-State Lamb Shift in Heavy Ions. In: Beyer, H.F., Shevelko, V.P. (eds) Atomic Physics with Heavy Ions. Springer Series on Atoms+Plasmas, vol 26. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-58580-7_7
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