Magneto-Optical Trap for Thulium Atoms

Details Magneto-Optical Trap for Thulium Atoms Magneto-Optical Trap for Thulium Atoms

2010-03-03

arxiv.org/abs/1003.0877v2

Phys. Rev. A 82, 011405(R) (2010)

Physics

Atomic Physics

4 pages, 6 figures

Scientific paper

10.1103/PhysRevA.82.011405

Thulium atoms are trapped in a magneto-optical trap using a strong transition at 410 nm with a small branching ratio. We trap up to $7\times10^{4}$ atoms at a temperature of 0.8(2) mK after deceleration in a 40 cm long Zeeman slower. Optical leaks from the cooling cycle influence the lifetime of atoms in the MOT which varies between 0.3 -1.5 s in our experiments. The lower limit for the leaking rate from the upper cooling level is measured to be 22(6) s$^{-1}$. The repumping laser transferring the atomic population out of the F=3 hyperfine ground-state sublevel gives a 30% increase for the lifetime and the number of atoms in the trap.

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