Laser-trapping of Ra-225 and Ra-226 with repumping by room temperature blackbody radiation

Details Laser-trapping of Ra-225 and Ra-226 with repumping by room temperature blackbody radiation Laser-trapping of Ra-225 and Ra-226 with repumping by room temperature blackbody radiation

2007-01-23

arxiv.org/abs/physics/0701263v3

Phys. Rev. Lett. 98, 093001 (2007)

Physics

Atomic Physics

4 pages, 4 figures, to be published in Phys. Rev. Lett; v2: shortened slightly; v3: added additional HFS theory numbers and re

Scientific paper

10.1103/PhysRevLett.98.093001

We have demonstrated Zeeman slowing and capture of neutral Ra-225 and Ra-226 atoms in a magneto-optical trap (MOT). The intercombination transition 1S0-3P1 is the only quasi-cycling transition in radium and was used for laser-cooling and trapping. Repumping along the 3D1-1P1 transition extended the lifetime of the trap from milliseconds to seconds. Room-temperature blackbody radiation was demonstrated to provide repumping from the metastable 3P0 level. We measured the isotope shift and hyperfine splittings on the 3D1-1P1 transition with the laser-cooled atoms, and set a limit on the lifetime of the 3D1 level based on the measured blackbody repumping rate. Laser-cooled and trapped radium is an attractive system for studying fundamental symmetries.

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