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Chinese Physics B

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

Jicai Zhang, Jinfeng Sun, Yufang Liu

Published Feb 1, 2011• 5 citations
Publisher

Abstract

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.

DOI
10.1088/1674-1056/20/2/023401

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The elastic scattering properties of cold atoms are very sensitive to the details of the interatomic potentials.Based on recent theoretical and experimental investigations,the research presents improved hybrid potentials for the singletX1 ∑g+and tripleta3∑u+ground states of the6Li2by the cubic spline interpolation and extrapolation.The calculated values for the scattering lengths are compared with previous results,and good agreements are obtained.The scattering lengths are 36.5a0for the singlet state and-2138.74a0for the triplet state.
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