Berlin 2005 – wissenschaftliches Programm
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A: Atomphysik
A 4: Precision Spectroscopy of Atoms and Molecules II
A 4.2: Fachvortrag
Freitag, 4. März 2005, 17:00–17:15, HU 3075
Extending g-factor measurements to heavy highly-charged ions — •Joseba Alonso1,2, Thomas Beier1, Slobodan Djekic1, Fernando Galve1, Hans-Jürgen Kluge2, Wolfgang Quint2, Stefan Stahl1, Tristan Valenzuela1, José Verdú1, Manuel Vogel1, and Günther Werth1 — 1Institut für Physik, Universität Mainz, 55099 Mainz — 2GSI, 64291 Darmstadt
Measurements of the anomalous magnetic moment of the electron bound in hydrogen*like ions with spinless nuclei have proven to be highly sensitive tests of corresponding calculations based on bound-*state quantum electrodynamics (BS-QED). Measurements performed on 12C5+ [1] and 16O7+ [2] together with bound-*state QED calculations on the same level of accuracy have achieved sensitivities around 0.25% of the calculated bound-state contributions to the g-*factors of these ions. Currently, a similar experiment on hydrogen*like calcium 40Ca19+, lithiumlike calcium 40Ca17+ and other systems is prepared [3], which is in principle capable of increasing the sensistivity of this bound-state QED test by more than one order of magnitude. To that end, several novel experimental techniques have been developed. A motivation as well as experimental requirements and techniques for such a measurement are presented and the possible benefits will be discussed.
[1] H. Häffner, et al., Phys. Rev. Lett. 85, 5308-5311 (2000)
[2] J. Verdú, et al., Phys. Rev. Lett. 92, 093002 (2004)
[3] M. Vogel, et al., submitted to Nucl. Inst. Meth. B (HCI-2004 proceedings)