Abstract
The ESR storage ring offers unique conditions for precision investigations in the realm of atomic structure and collisions research at highest nuclear charges. For atomic structure studies, a very recent experiment will be discussed aiming on a precise determination of the electron–electron QED contribution to the groundstate ionization potential in He-like uranium. For the regime of collision dynamics, the close interplay between dynamics and atomic structure is outlined. Here, for the case of the 2p3/2→1s1/2 transition in H-like uranium, a strong interference between the E1 and M2 transition amplitudes has been identified which gives rise to a remarkable modification of the angular distribution of emitted photons.
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