Abstract
Atomic parity violation (APV) experiments are sensitive probes of the electroweak interaction at low energy. These experiments are competitive with and complementary to high-energy collider experiments. The APV signal is strongly enhanced in heavy atoms and it is measurable by exciting suppressed (M1, E2) transitions. The status of APV experiments and theory are reviewed as well as the prospects of an APV experiment using one single trapped Ra + ion. The predicted enhancement factor of the APV effect in Ra + is about 50 times larger than in Cs atoms. However, certain spectroscopic information on Ra + needed to constrain the required atomic many-body theory, was lacking. Using the AGOR cyclotron and the TRIμP facility at KVI in Groningen, short-lived 212 − 214Ra + ions were produced and trapped. First ever excited-state laser spectroscopy was performed on the trapped ions. These measurements provide a benchmark for the atomic theory required to extract the electroweak mixing angle to sub-1% accuracy and are an important step towards an APV experiment in a single trapped Ra + ion.
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FOM projectruimte 06PR2499, NWO Toptalent, ITS LEIF.
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Versolato, O.O., Wansbeek, L.W., Giri, G.S. et al. Atomic parity violation in a single trapped radium ion. Hyperfine Interact 199, 9–19 (2011). https://doi.org/10.1007/s10751-011-0296-6
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DOI: https://doi.org/10.1007/s10751-011-0296-6