Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 14: Poster: Precision spectroscopy of atoms and ions (with Q)
A 14.6: Poster
Montag, 17. März 2014, 16:30–18:30, Spree-Palais
Towards Bound-Electron g-Factor Measurements by Double-Resonance Spectroscopy — •Marco Wiesel1,2,4, David von Lindenfels1,2,3, Wolfgang Quint1,2, Manuel Vogel1,4, Alexander Martin4, and Gerhard Birkl4 — 1GSI Darmstadt, Germany — 2Universität Heidelberg, Germany — 3MPI-K Heidelberg, Germany — 4TU Darmstadt, Germany
Magnetic moment measurements of electrons bound in highly charged ions provide access to effects of quantum electrodynamics (QED) in the extreme fields close to the ionic nucleus. We report on the cryogenic Penning trap setup ARTEMIS to determine the electronic g-factor of boron-like argon (Ar13+) via the method of double-resonance spectroscopy: A closed cycle between the fine-structure levels 22 P1/2 - 22 P3/2 is driven by a laser whereas microwaves are tuned to excite transitions between Zeeman-sublevels. With this frequency and the measurement of the ion cyclotron frequency the g-factor can be determined with an expected accuracy of 10−9 or better.
After these measurements, the setup will be connected to the HITRAP beamline at GSI, so hyperfine structure transitions of hydrogen-like heavy ions can be studied and electronic and nuclear magnetic moments can be measured.
Supported by DFG