Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 26: Poster III

A 26.46: Poster

Donnerstag, 17. März 2011, 16:00–18:30, P2

Precision Spectroscopy of Trapped Radium Ions — J.E. van den Berg, •G.S. Giri, D.J. van der Hoek, S.M. Hoekman, S. Hoekstra, K. Jungmann, W.L. Kruithof, M. Nunez-Portela, C.J.G. Onderwater, E.B. Prinsen, B.K. Sahoo, B. Santra, M. Sohani, P.D. Shidling, R.G.E. Timmermans, O.O. Versolato, L.W. Wansbeek, L. Willmann, and H.W. Wilschut — Kernfysisch Versneller Instituut, University of Groningen, The Netherlands

Radium ion is an ideal candidate for high precision experiments. Atomic Parity Violation (APV) can be measured in a single trapped and laser cooled Ra⁺, enabling a precise measurement of the electroweak mixing angle in the Standard Model of particle physics at the lowest possible momentum transfer. Ultra-narrow transitions in this system can also be exploited to realize a high stability frequency standard. As an important step towards such high precision experiments, excited-state laser spectroscopy is being performed with trapped short-lived ^209−214Ra⁺ ions. The results on hyperfine structure, isotope shift and lifetime provide benchmark for the required atomic theory. The experimental set up to perform laser cooling of the trapped radium ions and trapping of a single radium ion is under way.