Hamburg 2009 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 12: Precision Spectroscopy of Atoms and Ions II
A 12.2: Vortrag
Dienstag, 3. März 2009, 14:30–14:45, VMP 6 HS-C
Status of the g-factor experiment — •Birgit Schabinger1, Klaus Blaum2, Wolfgang Quint3, Sven Sturm1, and Anke Wagner2 — 1Institute of — 2MPI für Kernphysik, 69117 Heidelberg, Germany — 3GSI Darmstadt, 64291 Darmstadt, Germany
Calculations of the bound-state quantum electrodynamic (BS-QED) can be tested by high-precision measurements of the magnetic moment of the electron bound in highly-charged ions. In the past, g-factor measurements were done on light ions with relative uncertainties δg/g below 10−9 [1]. Since the influence of the BS-QED increases with the nuclear charge, the current experiment [2] aims for measurements on medium-heavy ions like silicon (Z=14) and calcium (Z=20). The ions are created in-trap by a mini electron-beam ion source [3]. In the experiment the g-factor measurement of a single ion will be performed in a double Penning-trap setup employing the “continuous Stern-Gerlach-effect". Here the g-factor measurement is reduced to the measurements of the three eigenfrequencies of the ion (ν+,ν− and νz) and the spin precession frequency (νL). First results with single ions and the status of the experiment will be presented .
[1] G. Werth et al., Int. J. Mass Spec. 251, 152 (2006)
[2] M. Vogel et al., Nucl. Inst. Meth. B 235, 7 (2005)
[3] B. Schabinger et al., J. Phys. Conf. Ser. 58, 121 (2007)