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We have demonstrated Zeeman slowing and capture of neutral Ra-225 and Ra-226atoms in a magneto-optical trap (MOT). The intercombination transition 1S0-3P1is the only quasi-cycling transition in radium and was used for laser-coolingand trapping. Repumping along the 3D1-1P1 transition extended the lifetime ofthe trap from milliseconds to seconds. Room-temperature blackbody radiation wasdemonstrated to provide repumping from the metastable 3P0 level. We measuredthe isotope shift and hyperfine splittings on the 3D1-1P1 transition with thelaser-cooled atoms, and set a limit on the lifetime of the 3D1 level based onthe measured blackbody repumping rate. Laser-cooled and trapped radium is anattractive system for studying fundamental symmetries.Comment: 4 pages, 4 figures, to be published in Phys. Rev. Lett; v2: shortened  slightly; v3: added additional HFS theory numbers and references, fina

physical review letters

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

Laser Trapping ofRa225andRa226with Repumping by Room-Temperature Blackbody Radiation