Düsseldorf 2007 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 5: Precision spectroscopy II
A 5.7: Vortrag
Montag, 19. März 2007, 18:00–18:15, 6G
Towards a g-factor determination of the bound electron in highly-charged calcium ions — •Birgit Schabinger1, Joseba Alonso1,2, Klaus Blaum1,2, Jürgen Kluge2,3, Wolfgang Quint2, Stefan Stahl4, Manuel Vogel2, and Günter Werth1 — 1Institute of Physics, Johannes Gutenberg-University, 55099 Mainz, Germany — 2GSI Darmstadt, 64291 Darmstadt, Germany — 3Ruprecht-Karls-University, 69047 Heidelberg, Germany — 4Stahl-Electronics, 67582 Mettenheim, Germany
Bound-state quantum electrodynamical (BS-QED) calculations can be tested by high-precision measurements of the magnetic moment of the electron bound in highly-charged ions. In the past, measurements were performed on hydrogen-like carbon and oxygen [1]. The influence of the BS-QED contribution to the g-factor increases with the nuclear charge. In the current experiment [2] we plan to measure the g-factor of calcium 40Ca17+ and 40Ca19+ ions. The ions are created in-trap by a mini electron beam ion source [3]. The g-factor measurement of a single ion is performed in a double Penning-trap setup employing the “continuous Stern-Gerlach-effect". The aim is to reach a relative uncertainty in the order of 10−9. In the future, we plan to extend our g-factor measurements up to uranium 238U91+ at the HITRAP facility. The status of the experiment will be presented.
[1] W.Werth et al., Int. J. Mass Spec. 251, 152 (2006)
[2] M. Vogel et al., Nucl. Inst. Meth. B 235, 7 (2005)
[3] J. Alonso et al., Rev. Sci. Instr. 77, 03A901 (2006)