Trapping and sympathetic cooling of single thorium ions for spectroscopy

  title={Trapping and sympathetic cooling of single thorium ions for spectroscopy},
  author={Karin Groot-Berning and Felix Stopp and Georg Jacob and Dmitry Budker and Raphael Haas and D Renisch and J{\"o}rg Runke and Petra Thorle-Pospiech and Ch.E. Dullmann and Ferdinand Schmidt-Kaler},
  journal={Physical Review A},
Precision optical spectroscopy of exotic ions reveals accurate information about nuclear properties such as charge radii and magnetic and quadrupole moments. Thorium ions exhibit unique nuclear properties with high relevance for testing symmetries of nature. We report loading and trapping of single $^{232}$Th$^+$ ions in a linear Paul trap, embedded into and sympathetically cooled by small crystals of trapped $^{40}$Ca$^+$ ions. Trapped Th ions are identified in a non-destructive manner from… Expand

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