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Laser cooling of a natural isotope mixture of Yb+ stored in an RF trap

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2 Author(s)
Sugiyama, K. ; Nat. Res. Lab. of Metrol., Ibaraki, Japan ; Yoda, J.

We demonstrate laser cooling of Yb+, produced by ionization of a natural isotope mixture, stored in an RF trap. One of the three major even isotopes was directly laser cooled and other isotopes were simultaneously trapped as a result of sympathetic cooling. It was possible to carry out laser cooling to the temperature at which the cloud-to-crystal phase transition occurs for 174Yb+ , as observed in the case where enriched isotopes are used. We observed sudden drops of fluorescence owing to pumping to the 2 F7/2 state in the case of a small number of trapped Yb + ions

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Instrumentation and Measurement, IEEE Transactions on  (Volume:44 ,  Issue: 2 )