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Chinese Physics, 2006, Vol. 15(3): 531-535    DOI: 10.1088/1009-1963/15/3/014
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Accurate calculation of the elastic scattering properties of 7Li atoms at ultralow temperatures

Sun Jin-Feng (孙金锋)ab, Zhang Ji-Cai (张计才)a, Wang Jie-Min (王杰敏)a
a Department of Physics, Henan Normal University, Xinxiang 453007, China; b China Center of Advanced Science and Technology (World Laboratory), Beijing 100080, China
Abstract  The elastic scattering properties for collisions between two 7Li atoms are investigated in the cold and ultracold regimes separately. Based on recent theoretical and experimental results, we present the improved hybrid potentials for the singlet X1g+ and triplet a3u+ ground states of the Li2. Our calculated values for the scattering lengths a and the effective ranges re are compared with previous ones and found them to be in good agreement. The scattering lengths are 34.6a0 for the singlet state and ?27.6a0 for the triplet state. Shape resonances occur in the collisions at low energies. We also calculate the total cross sections and the energy positions of shape resonances for both X1g+ and a3u+ states.
Keywords:  scattering length      elastic cross section      shape resonance  
Received:  16 July 2005      Revised:  22 November 2005      Accepted manuscript online: 
PACS:  34.80.Bm (Elastic scattering)  
  34.20.Cf (Interatomic potentials and forces)  
  34.20.-b (Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10174019).

Cite this article: 

Sun Jin-Feng (孙金锋), Zhang Ji-Cai (张计才), Wang Jie-Min (王杰敏) Accurate calculation of the elastic scattering properties of 7Li atoms at ultralow temperatures 2006 Chinese Physics 15 531

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