Physikalisches Kolloquium

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Kirchhoff-Institut für Physik, Otto-Haxel-Hörsaal
Friday 17:15

18.1.2019 17:00
Prof. Dr. Klaus Blaum, Max-Planck-Institut für Kernphysik, Heidelberg
KIP, INF 227, Otto-Haxel-Hörsaal

An overview is given on recent measurements with extreme precision on single or few cooled ions stored in Penning traps. On the one hand, mass measurements provide crucial information for atomic, nuclear and neutrino physics as well as for testing fundamental symmetries. On the other and, g-factor measurements of the bound electron in highly-charged hydrogen-like ions allow for the determination of fundamental constants and for constraining Quantum Electrodynamics. For example, the most stringent test of CPT symmetry in the baryonic sector could be performed by mass comparison of the antiproton with H- and the knowledge of the electron atomic mass could be improved by a factor of 13.