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A: Fachverband Atomphysik

A 8: Precision Spectroscopy III

A 8.7: Vortrag

Dienstag, 20. März 2007, 15:45–16:00, 6G

Test of a Penning Trap dedicated for Laser Spectroscopy of Highly Charged Ions — •Zoran Andjelkovic¹, Christopher Geppert², Jörg Krämer¹, Manuel Vogel², and Wilfried Nörtershäuser^1,2 — ¹Nuclear Chemistry, University of Mainz, Germany — ²GSI, Darmstadt, Germany

Precision hyperfine structure measurements of highly charged ions are planed using a cryogenic Penning trap. Ions like ²⁰⁷Pb⁸¹⁺, produced at the HITRAP at GSI Darmstadt, will be trapped and cooled down to temperatures of about 4 K via resistive cooling. Thus the Doppler broadening of the resonance lines can be reduced to some 10 MHz in a transition frequency of some 10¹⁴ Hz, which makes the planned measurements roughly two orders of magnitude more precise than all previous ones. We present the experimental setup for laser spectroscopy and first test measurements with ⁴⁰Ca⁺ ions where we operate the trap as an RF trap, as well as detection methods that will be applied.