|author(s)||S. Knoop, T. Schuster, R. Scelle, A. Trautmann, J. Appmeier, and M. K. Oberthaler, E. Tiesinga, E. Tiemann†|
|title||Feshbach spectroscopy and analysis of the interaction potentials of ultracold sodium|
|Keywords||Feshbach spectroscopy, sodium|
|source||American Physical Society, Phys. Rev. A, arXiv:1102.0572|
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 200 mT. 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.
|URL||Phys. Rev. A 83, 042704|