Elastic Scattering Properties of Ultracold Strontium Atoms

We investigate the elastic scattering properties of strontium atoms at ultracold temperatures. The scattering parameters, such as s-wave scattering lengths, effective ranges and p-wave scattering lengths, are calculated for all stable isotope combinations of Sr atoms by the quantal method and semiclassical method, respectively. Good agreements are obtained. The scattering parameters are very sensitive to small changes of the reduced mass. Due to the repulsive interisotope and intraisotope s-wave scattering length and large elastic cross sections, ⁸⁴Sr–⁸⁶Sr mixture is a good candidate to realize Bose–Bose quantum degenerate atomic gases.