Hamburg 2009 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 15: Poster I

A 15.13: Poster

Dienstag, 3. März 2009, 16:30–19:00, VMP 9 Poster

High-Precision Experiments on a Single Trapped Radium Ion — O. Boell, G.S. Giri, K. Jungmann, B.K. Sahoo, R.G.E. Timmermans, •O.O. Versolato, L.W. Wansbeek, and L. Willmann — KVI, University of Groningen, The Netherlands

A single, trapped radium ion is an ideal candidate for high precision experiments. Two Ra⁺ experiments are under construction at KVI. Ultra-narrow transitions in radium ions provide an excellent basis for an all-optical, high-stability frequency standard, i.e. a clock. The off-the-shelf availability of semiconductor lasers for all necessary transitions is highly advantageous. In certain odd isotopes of radium, the nuclear electric quadrupole shift is absent. The same system and experimental hardware will be used to search for physics beyond the Standard Model of particle physics by measuring Atomic Parity Violation. This will serve as a low-energy test of the running of the electroweak mixing angle. Recent calculations have shown Ra⁺ to be the superior candidate. Recently we have succeeded in the production and efficient slowing down of isotopes around ²¹³Ra at the AGOR cyclotron and the TRIµP facility of KVI. Progress has been made in the development of ion traps and in the laser set-up in a dedicated laser laboratory. Laser spectroscopy of the radium ion and the first ever trapping of this particle are planned in the near future.