Feb 6 – 8, 2006
Europe/Zurich timezone

Proposal for a Nuclear Charge Radius Measurement of the Halo Isotope 11Be

Feb 6, 2006, 4:00 PM
Council Chamber, 503/1-001 (CERN)

Council Chamber, 503/1-001


CH-1211 Geneva 23


Dr Wilfried Nörtershäuser (University of Mainz)


A measurement of the optical isotope shift in beryllium isotopes will allow a model-independent determination of the nuclear charge radius of Be-7,9,10 and the halo nucleus Be-11. This is based on an accurate calculation of the mass-dependent part of the isotope shift in the respective transition, combined with a precise measurement of the total isotope shift. Both values must be determined with an accuracy of better than 1E-5. Similar measurements have been performed recently on He-6 in a Magneto-Optical Trap [Wang et al. PRL 93, 142501 (2004)] and on Li-8,9,11 with Resonance Ionization Spectroscopy [Ewald et al., PRL 93, 113002 (2004)]. Corresponding atomic structure calculations with the required precision have so-far been demonstrated only for systems with up to three electrons. Thus, we propose to measure the isotope shift in the 2s-2p transition of laser-cooled Be-ions stored in a Paul trap.

Primary author

Dr Wilfried Nörtershäuser (University of Mainz)


Dr Bruce A Bushaw (Pacific Northwest National Laboratory, USA) Mr Christopher Geppert (GSI Darmstadt, Germany) Prof. Claus Zimmermann (University of Tübingen, Germany) Mr Dirk Tiedemann (University of Mainz, Germany) Prof. Ferdinand Schmidt-Kaler (University of Ulm, Germany) Prof. Gordon W.F. Drake (University of Windsor, Canada) Dr Guido Ewald (University of Tübingen, Germany) Prof. H.-Jürgen Kluge (GSI Darmstadt, Germany) Mrs Natalya Miski-Oglu (University of Mainz, Germany) Mr Rodolfo Sanchez (University of Mainz, Germany) Prof. Zong-Chao Yan (University of New Brunswick, Canada)

Presentation materials