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A: Fachverband Atomphysik
A 4: Atomic systems in external fields
A 4.6: Vortrag
Montag, 11. März 2019, 12:00–12:15, S HS 3 Physik
Penning Traps in Gravity: Implications for Free Electron g-factor Measurements — •Sebastian Ulbricht1,2, Robert A. Müller1,2, and Andrey Surzhykov1,2 — 1Physikalisch-Technische Bundesanstalt, Germany — 2Technische Universität Braunschweig, Germany
Today, the gyromagnetic ratio of a free electron is known to a very high accuracy of g/2=1.001 159 652 180 73 (28) [1] and the improvement of this value is still an ongoing process in modern research. The g-factor is currently determined by spectroscopy of spin-flip and cyclotron transitions of a single electron in a Penning trap. These experiments, however, are not performed in an isolated environment, but in the gravitational field of the Earth. In this contribution, therefore, we present investigations of gravitational effects on the trapped electron and the Penning trap itself. More specifically, we take into account gravitational effects on the electromagnetic field of the Penning trap, which in turn effect the motion of the electron. We derived the resulting relativistic corrections of order 1/c2 to transition frequencies, used to determine the free electron g-factor. As a consequence an extension of the well known g-factor formula introduced by L. S. Brown and G. Gabrielse [2] is presented.
[1] D. Hanneke, S. Fogwell, and G. Gabrielse, Phys. Rev. Lett. 100, ...... 120801 (2008).
[2] L. S. Brown and G. Gabrielse, Rev. Mod. Phys. 58, 233 (1986).