Calculation of scattering parameters for ultracold ⁶Li–⁷Li elastic collisions

This paper theoretically studies the elastic scattering properties in a mixture of ⁶Li and ⁷Li atoms at cold and ultracold temperatures. Based on the constructed accurate interatomic potential of the triplet state for ⁶Li⁷Li mixture by the mass scaling method, it calculates the interspecies s-wave scattering lengths and the p-wave scattering lengths by the variable phase method and the semiclassical method, respectively. The scattering length is in good agreement with the experiment. The partial-wave and total cross sections are also calculated and a rich resonance structure is found.