Hannover 2016 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 30: Precision spectroscopy of atoms and ions (with Q)
A 30.14: Poster
Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof
Spectroscopy of trapped 138Ba+ ions for atomic parity violation and optical clocks — •Elwin A. Dijck, Amita Mohanty, Nivedya Valappol, J. Olivier Grasdijk, Oliver Böll, Andrew T. Grier, Klaus Jungmann, Mayerlin Nuñez Portela, and Lorenz Willmann — Van Swinderen Institute, University of Groningen, The Netherlands
The heavy alkaline earth ions Ba+ and Ra+ are good candidates for a precision measurement of the weak mixing angle at low energy as well as for building an optical atomic clock. One requirement for these applications is to determine the atomic structure to percent level. We have studied the lifetime of the metastable 5d 2D5/2 level in 138Ba+ as a benchmark for theory calculations. Systematic effects are investigated by comparing multiple measurement schemes on a single and multiple trapped ions. In addition, we have measured the transition frequencies between the 6s 2S1/2, 6d 2P1/2 and 5d 2D3/2 levels in 138Ba+ to 100 kHz accuracy [1], improving the knowledge of these frequencies by more than two orders of magnitude.
[1] E. A. Dijck et al., Phys. Rev. A 91, 060501(R) (2015)