Düsseldorf 2007 – scientific programme

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A: Fachverband Atomphysik

A 2: Precision spectroscopy I

A 2.1: Invited Talk

Monday, March 19, 2007, 10:30–11:00, 6G

High-precision atomic physics experiments with stored and cooled ions in Penning traps — •Klaus Blaum — Gesellschaft für Schwerionenforschung GSI Darmstadt, 64291 Darmstadt, Germany — Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany

Accumulation, storing and cooling techniques for ions play an increasingly important role in many areas of science. In this respect, Penning traps have been recast as ideal tools for high-precision experiments, especially if the measurement is based on a frequency determination. Therefore, one can benefit from the existing relation between a frequency and the interesting properties, like the mass and the g-factor, of the particle to which it is related.

The presentation will concentrate on recent applications of Penning traps in the field of atomic physics at GSI Darmstadt and the University of Mainz. These are high-accuracy mass measurements, g-factor determinations of the bound-electron in highly-charged, hydrogen-like and lithium-like ions and g-factor measurements of the proton and, later, the antiproton. These experiments are dedicated e.g. to astrophysics studies in the case of mass measurements on radionuclides and to the determination of fundamental constants and a test of the CPT theorem in the case of g-factor measurements [1]. An overview of the three mentioned experiments and recent results will be presented.

[1] K. Blaum, Phys. Rep. 425, 1-78 (2006)