Hannover 2013 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 2: Precision spectroscopy of atoms and ions I (with Q)
A 2.3: Vortrag
Montag, 18. März 2013, 11:30–11:45, B 302
The Lamb shift measurement in muonic helium ions. — •Marc Diepold and The CREMA Collaboration — Max-Planck-Institute of Quantum Optics, Garching
In 2013, the CREMA collaboration will measure the 2S - 2P transition frequencies (Lamb shift) in µ4He + and µ3He+ using laser spectroscopy.
This measurement will achieve ten times more accurate values for the absolute nuclear charge radii of the lightest helium isotopes, as well as evaluate the µ3He+ hyperfine structure to determine the magnetic moment distribution of the 3He nucleus.
Charge radii provided by this experiment will serve as a benchmark for few-nucleon nuclear models and as the basis for stringent tests of higher order bound-state QED contributions.
In addition, the muonic helium measurements should be able to shed new light on the "proton size puzzle", i.e. the seven sigma discrepancy of our charge radius determination in muonic hydrogen and the 2009 CODATA value.