Inelastic Collisions in Optically Trapped Ultracold Metastable Ytterbium

Details Inelastic Collisions in Optically Trapped Ultracold Metastable Ytterbium Inelastic Collisions in Optically Trapped Ultracold Metastable Ytterbium

2008-02-04

arxiv.org/abs/0802.0461v1

Physics

Atomic Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.101.233002

We report measurement of inelastic loss in dense and cold metastable ytterbium (Yb[$^3P_2$]). Use of an optical far-off-resonance trap enables us to trap atoms in all magnetic sublevels, removing multichannel collisional trap loss from the system. Trapped samples of Yb[$^3P_2$] are produced at a density of 2$\times10^{13}$ cm$^{-3}$ and temperature of 2 $\mu$K. We observe rapid two-body trap loss of Yb[$^3P_2$] and measure the inelastic collision rate constant 1.0(3)$\times10^{-11}$ cm$^3$s$^{-1}$. The existence of the fine-structure changing collisions between atoms in the $^3P_2$ state is strongly suggested.

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