Magnetic trapping of silver and copper, and anomolous spin relaxation in the Ag-He system

Details Magnetic trapping of silver and copper, and anomolous spin relaxation in the Ag-He system Magnetic trapping of silver and copper, and anomolous spin relaxation in the Ag-He system

2008-04-04

arxiv.org/abs/0804.0766v2

Phys. Rev. Lett. 101, 103002 (2008)

Physics

Atomic Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.101.103002

We have trapped large numbers of copper and silver atoms using buffer gas cooling. Up to 3x10^12 copper atoms and 4x10^13 silver atoms are trapped. Lifetimes are as long as 5 s, limited by collisions with the buffer gas. Ratios of elastic to inelastic collision rates with He are >~ 10^6, suggesting copper and silver are favorable for use in ultracold applications. The temperature dependence of the silver-helium-3 collision rate varies as T^5.8. We find that this temperature dependence is inconsistent with the behavior predicted for relaxation arising from the spin-rotation interaction, and conclude that the silver-helium-3 system displays anomalous collisional behavior in the multiple-partial wave regime. Lifetimes of laser ablated gold in helium-3 buffer gas are too short to permit trapping.

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