Characterization of elastic scattering near a Feshbach resonance in rubidium 87
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The s-wave scattering length for elastic collisions between 87Rb atoms in the state |f,m_f>=|1,1> is measured in the vicinity of a Feshbach resonance near 1007 G. Experimentally, the scattering length is determined from the mean-field driven expansion of a Bose-Einstein condensate in a homogeneous magnetic field. The scattering length is measured as a function of the magnetic field and agrees with the theoretical expectation. The position and the width of the resonance are determined to be 1007.40 G and 0.20 G, respectively.
4 pages, 2 figures minor revisions: added Ref.6, included error bars
4 pages, 2 figures minor revisions: added Ref.6, included error bars