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We report a dramatic magnetic field dependence in the lifetime of trapped,ultracold diatomic molecules created through an s-wave Feshbach resonance in40K. The molecule lifetime increases from less than 1 ms away from the Feshbachresonance to greater than 100 ms near resonance. We also have measured thetrapped atom lifetime as a function of magnetic field near the Feshbachresonance; we find that the atom loss is more pronounced on the side of theresonance containing the molecular bound state

physical review letters

Lifetime of Molecule-Atom Mixtures near a Feshbach Resonance in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">K</mml:mi><mml:mprescripts /><mml:none /><mml:mn mathvariant="normal">40</mml:mn></mml:mmultiscripts></mml:math>

Lifetime of Molecule-Atom Mixtures near a Feshbach Resonance inK40