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19 April 2024

» arxiv » 1102.0572

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Feshbach spectroscopy and analysis of the interaction potentials of ultracold sodium
S. Knoop ; T. Schuster ; R. Scelle ; A. Trautmann ; J. Appmeier ; M. K. Oberthaler ; E. Tiesinga ; E. Tiemann ;
Date:	2 Feb 2011
Abstract:	We have studied magnetic Feshbach resonances in an ultracold sample of Na prepared in the absolute hyperfine ground state. We report on the observation of three s-, eight d-, and three g-wave Feshbach resonances, including a more precise determination of two known s-wave resonances, and one s-wave resonance at a magnetic field exceeding 200mT. Using a coupled-channels calculation we have improved the sodium ground-state potentials by taking into account these new experimental data, and derived values for the scattering lengths. In addition, a description of the molecular states leading to the Feshbach resonances in terms of the asymptotic-bound-state model is presented.
Source:	arXiv, 1102.0572
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