标题： 费什巴赫光谱学和超冷钠的相互作用势分析 显示英文标题

标题： Feshbach spectroscopy and analysis of the interaction potentials of ultracold sodium

摘要： 我们研究了在绝对超精细基态中制备的钠超冷样品中的磁Feshbach共振。 我们观察到了三个s波、八个d波和三个g波Feshbach共振，包括对两个已知s波共振的更精确确定，以及一个在磁场超过200mT处的s波共振。 通过耦合通道计算，我们考虑了这些新的实验数据，改进了钠的基态势能，并得出了散射长度的值。 此外，还以渐近束缚态模型的形式描述了导致Feshbach共振的分子态。 显示英文摘要

摘要： 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.