Ra+ ion trapping: toward an atomic parity violation measurement and an optical clock

  title={Ra+ ion trapping: toward an atomic parity violation measurement and an optical clock},
  author={Mayerlin Nu{\~n}ez Portela and Elwin A. Dijck and Amita Mohanty and Hendrik Bekker and J. E. Berg and Gouri Shankar Giri and Steven Hoekstra and C. J. G. Onderwater and Sophie Schlesser and Rob G. E. Timmermans and Oscar O. Versolato and Lorenz Willmann and Hans W. Wilschut and Klaus Jungmann},
  journal={Applied Physics B},
A single Ra+ ion stored in a Paul radio frequency ion trap has excellent potential for a precision measurement of the electroweak mixing angle at low momentum transfer and as the most stable optical clock. The effective transport and cooling of singly charged ions of the isotopes 209Ra to 214Ra in a gas filled radio frequency quadrupole device is reported. The absolute frequencies of the transition 7s2S1/2–7d2D3/2 at wavelength 828 nm have been determined in 212–214Ra+ with ≤19 MHz uncertainty… 
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