Stuttgart 2012 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 43: Precision spectroscopy of atoms and ions IV
A 43.2: Vortrag
Freitag, 16. März 2012, 10:45–11:00, V47.03
Atomic Parity Violation in a single Ra ion — •M. Nunes Portela, H. Beker, G. Giri, K. Jungmann, C.J.G. Onderwater, S. Schlesser, R.G.E. Timmermans, O.O. Versolato, L. Willmann, and H.W. Wilschut — KVI, University of Groningen, NL
Precision measurements of atomic parity violation is the only path to determine the electroweak mixing angle in the Standard Model of particle physics at low energy scale. A single trapped Ra+ ion is the most promising candidate for such an experiment. The system combines the advantages of large parity violation amplitudes due to the faster than Z3 scaling, the possibility to perform accurate atomic structure calculation on this one valence electron system and the ability to precision frequency measurements on trapped ion. Our first laser spectroscopy on an ensemble of trapped short-lived 209−214Ra+ isotopes in a linear Paul trap provided hyperfine structure of the 6d 2D3/2 states and isotope shift of the 6d 2D3/2 - 7p 2P1/2 transition [1,2]. These results provide input for the ongoing precision atomic structure calculations. The next step of the experiments towards laser cooling of a single trapped radium ion. The experimental setup is being commissioned with Ba ions.
[1] O.O. Versolato et al. Phys. Lett. A 375 (2011) 3130-3133.
[2] G.S. Giri et al. Phys. Rev. A 84 (2011) 020503(R).