Elastic Scattering between Ultracold ²³Na and ⁸⁵Rb Atoms in the Triplet State

The elastic scattering properties between ultracold ²³Na and ⁸⁵Rb atoms for the triplet state (a³∑_u⁺) are researched. The s−wave scattering lengths of ²³Na and ⁸⁵Rb are calculated by the Numerov and semiclassical method with two kinds of interatomic potentials, which are the interpolation potential and Lennard–Jones potential (LJ_12,6) by the same phase ϕ. Shape resonances appear clearly in the l=5 partial waves for the a³∑_u⁺ state. Moreover, the s-wave scattering cross section, total cross section and energy positions of shape resonances are also discussed.