Offline trapping of 221Fr in a magneto-optical trap from implantation of an 225Ac ion beam

  title={Offline trapping of 221Fr in a magneto-optical trap from implantation of an 225Ac ion beam},
  author={Micha{\"e}l Tandecki and J. Zhang and S. Aubin and John A. Behr and R. Collister and Eduardo G{\'o}mez and Gerald Gwinner and Henning Heggen and J. Lassen and L. A. Orozco and M. R. Pearson and Sebastian Raeder and Andrea Teigelh{\"o}fer},
  journal={Journal of Instrumentation},
  pages={P10013 - P10013}
We demonstrate a new technique to prepare an offline source of francium for trapping in a magneto-optical trap. Implanting a radioactive beam of 225Ac, t1/2 = 9.920(3) days, in a foil, allows use of the decay products, i.e. 221Fr, t1/2 = 288.0(4) s. 221Fr is ejected from the foil by the α decay of 225Ac. This technique is compatible with the online accumulation of a laser-cooled atomic francium sample for a series of planned parity non-conservation measurements at TRIUMF. We obtain a 34… 

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