Feshbach resonances in ultracold K(39)

Details Feshbach resonances in ultracold K(39) Feshbach resonances in ultracold K(39)

2007-05-21

arxiv.org/abs/0705.3036v1

Physics

Atomic Physics

7 pages, 6 figures

Scientific paper

10.1088/1367-2630/9/7/223

We discover several magnetic Feshbach resonances in collisions of ultracold K(39) atoms, by studying atom losses and molecule formation. Accurate determination of the magnetic-field resonance locations allows us to optimize a quantum collision model for potassium isotopes. We employ the model to predict the magnetic-field dependence of scattering lengths and of near-threshold molecular levels. Our findings will be useful to plan future experiments on ultracold potassium atoms and molecules.

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