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g-factor measurement of hydrogenlike 28Si13+ as a challenge to QED calculations

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons31090

Sturm,  Sven
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Institut für Physik, Johannes Gutenberg-Universität;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons31151

Wagner,  Anke
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30312

Blaum,  Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Citation

Sturm, S., Wagner, A., Kretzschmar, M., Quint, W., Werth, G., & Blaum, K. (2013). g-factor measurement of hydrogenlike 28Si13+ as a challenge to QED calculations. Physical Review A, 87(3): 030501(R), pp. 1-5. doi:10.1103/PhysRevA.87.030501.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000E-DE11-A
Abstract
Using a phase-detection method to determine the cyclotron frequency of a single trapped ion in a Penning trap allowed us to perform a measurement of the g factor of the bound electron in hydrogenlike 28Si13+ with a statistical uncertainty of 4×10−11. Furthermore, we reevaluated the image-charge shift as the main source of uncertainty. Our result challenges bound-state quantum-electrodynamical calculations by probing two-loop contributions of order (Zα) 6 and paves the way towards a more precise determination of fundamental constants as the electron mass.