Formation of van der Waals molecules in buffer gas cooled magnetic traps

Details Formation of van der Waals molecules in buffer gas cooled magnetic traps Formation of van der Waals molecules in buffer gas cooled magnetic traps

2010-03-04

arxiv.org/abs/1003.0948v2

Phys. Rev. Lett. 105, 033001 (2010)

Physics

Atomic Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.105.033001

We show that a large class of helium-containing cold polar molecules form readily in a cryogenic buffer gas, achieving densities as high as 10^12 cm^-3. We explore the spin relaxation of these molecules in buffer gas loaded magnetic traps, and identify a loss mechanism based on Landau-Zener transitions arising from the anisotropic hyperfine interaction. Our results show that the recently observed strong T^6 thermal dependence of spin change in buffer gas trapped silver (Ag) is accounted for by the formation and spin change of AgHe, thus providing evidence for molecular formation in a buffer gas trap.

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