1. Institute of Atomic and Molecular Physics Jilin University Changchun 130012 P.R. China
2. College of Information Technology Jilin Normal University Siping 136000 P.R. China
3. Institute of Fluid Physics China Academy of Engineering Physics Mianyang 621900 P.R. China
4. Institute of Atomic and Molecular Physics Institute of Theoretical Chemistry Jilin University Changchun 130012 P.R. China