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Laser Trapping of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Ra</mml:mi><mml:mprescripts /><mml:none /><mml:mn>225</mml:mn></mml:mmultiscripts></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Ra</mml:mi><mml:mprescripts /><mml:none /><mml:mn>226</mml:mn></mml:mmultiscripts></mml:math>with Repumping by Room-Temperature Blackbody Radiation
We have demonstrated Zeeman slowing and capture of neutral $^{225}\mathrm{Ra}$ and $^{226}\mathrm{Ra}$ atoms in a magneto-optical trap. The intercombination transition $^{1}S_{0}\ensuremath{\rightarrow}^{3}P_{1}$ is the only quasicycling transition in radium and was used for laser-cooling and trapping. Repumping along the $^{3}D_{1}\ensuremath{\rightarrow}^{1}P_{1}$ transition extended the lifetime of the trap from milliseconds to seconds. …