Hannover 2010 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 23: Poster II

A 23.12: Poster

Donnerstag, 11. März 2010, 16:30–19:00, Lichthof

Precision Laser Spectroscopy of Beryllium — •Rodolfo Sánchez^1,2, Monika Žáková¹, Zoran Andjelkovic¹, Klaus Blaum³, Mark L. Bissell⁴, Gordon W.F. Drake⁵, Christopher Geppert^1,2, Magdalena Kowalska⁴, Jörg Krämer¹, Andreas Krieger¹, Thomas Neff², Rainer Neugart¹, Ferdinand Schmidt-Kaler⁶, Dirk Tiedemann¹, Zong-C. Yan⁷, Deyan Yordanov⁴, Claus Zimmermann⁸, and Wilfried Nörtershäuser^1,2 — ¹Universität Mainz, Germany — ²GSI Darmstadt, Germany — ³MPI Heidelberg, Germany — ⁴CERN, Geneva, Switzerland — ⁵University of Windsor, Canada — ⁶Universität Ulm, Germany — ⁷University of New Brunswick, Canada — ⁸Universität Tübingen, Germany

The neutron-rich isotopes of beryllium exhibit a halo structure. Important information of this structure can be obtained by measuring its nuclear charge radius. We have recently performed high-resolution collinear laser spectroscopy on a 30 keV beryllium-ion beam and measured the isotope shifts in the 2 S_1/2→2 P_1/2,3/2 transitions of ^7,10,11Be⁺ with respect to ⁹Be⁺. These measurements were combined with high-accuracy atomic theory calculations and the nuclear charge radius of these isotopes was extracted. In this contribution the results of this experiment are presented and further measurements on ¹²Be⁺, which has about 1000 times smaller production rates as ¹¹Be⁺, are outline.