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A: Fachverband Atomphysik

A 12: Precision Spectroscopy of Atoms and Ions II

A 12.1: Fachvortrag

Dienstag, 3. März 2009, 14:00–14:30, VMP 6 HS-C

Laser-Microwave Double-Resonance Spectroscopy in a Penning Trap for g-Factor Measurements in Highly Charged Ions — Nicolaas Petrus Marcus Brantjes¹, •David von Lindenfels², Wolfgang Quint¹, and Manuel Vogel³ — ¹GSI, Darmstadt, Germany — ²University of Heidelberg, Heidelberg, Germany — ³Imperial College, London, United Kingdom

Precise determination of bound-electron g-factors in heavy highly-charged ions (e.g. Bi⁸²⁺, U⁹¹⁺) provides a stringent test of bound-state QED in extreme fields. The H-like and Li-like heavy ions, produced at GSI and slowed down at the HITRAP facility, will be loaded into a half-open cylindrical Penning trap and confined at cryogenic temperatures. With a laser-microwave double-resonance technique we can then probe microwave transitions between Zeeman sub-levels of the hyperfine structure in such ions. From this the ionic g-factors g_F can be measured with high accuracy. Both the electronic g-factor g_J and the nuclear g-factor g_I can be determined from a single experiment. This experiment will be a novel method to measure the g-factor of the bound electron.