中国物理B ›› 2009, Vol. 18 ›› Issue (4): 1486-1490.doi: 10.1088/1674-1056/18/4/033

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Calculation of the elastic collision properties of Na and Li atoms at ultracold temperature

张计才1, 张莹1, 杜丙阁1, 孙金锋2   

  1. (1)College of Physics and Information Engineering, Henan Normal University, Xinxiang 453007, China; (2)College of Physics and Information Engineering, Henan Normal University, Xinxiang 453007, China;Department of Physics, Luoyang Normal College, Luoyang 471022, China
  • 收稿日期:2008-06-22 修回日期:2008-08-02 出版日期:2009-04-20 发布日期:2009-04-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10574039) and the Natural Science Foundation of Henan Province (Grant No 2008A140007).

Calculation of the elastic collision properties of Na and Li atoms at ultracold temperature

Zhang Ji-Cai(张计才)a)†, Zhang Ying(张莹)a), Du Bing-Ge(杜丙阁)a), and Sun Jin-Feng(孙金锋)a)b)   

  1. a College of Physics and Information Engineering, Henan Normal University, Xinxiang 453007, China; b Department of Physics, Luoyang Normal College, Luoyang 471022, China
  • Received:2008-06-22 Revised:2008-08-02 Online:2009-04-20 Published:2009-04-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10574039) and the Natural Science Foundation of Henan Province (Grant No 2008A140007).

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摘要： This paper firstly reports a theoretical study of elastic scattering properties in a mixture of 23Na and 7Li atoms at cold and ultracold temperatures in detail. Based on the new constructed accurate singlet X1∑g+ and the triplet a3∑u+ states interatomic potentials for 23Na7Li mixture, it calculates the scattering lengths and the effective ranges by three computational methods, and obtains good agreements. Using the mass scaling method, it also calculates 23Na6Li scattering lengths and s-wave and total elastic cross sections, whose rich resonance structures were found and interpreted in terms of quasibound diatomic levels trapped behind a centrifugal barrier.

关键词: scattering length, elastic cross section, variable phase method

Abstract: This paper firstly reports a theoretical study of elastic scattering properties in a mixture of 23Na and 7Li atoms at cold and ultracold temperatures in detail. Based on the new constructed accurate singlet $X^1\varSigma_g^+$ and the triplet $a^3\varSigma_u^+$ states interatomic potentials for 23Na7Li mixture, it calculates the scattering lengths and the effective ranges by three computational methods, and obtains good agreements. Using the mass scaling method, it also calculates 23Na6Li scattering lengths and s-wave and total elastic cross sections, whose rich resonance structures were found and interpreted in terms of quasibound diatomic levels trapped behind a centrifugal barrier.

Key words: scattering length, elastic cross section, variable phase method

中图分类号:  (Scattering of atoms and molecules)

  • 34.50.-s
34.10.+x (General theories and models of atomic and molecular collisions and interactions (including statistical theories, transition state, stochastic and trajectory models, etc.)) 34.20.Cf (Interatomic potentials and forces)