%A Pengwei Li(李鹏伟), Yuqing Li(李玉清), Guosheng Feng(冯国胜), Jizhou Wu(武寄洲), Jie Ma(马杰), Liantuan Xiao(肖连团), Suotang Jia(贾锁堂) %T Effect of external magnetic field on the shift of resonant frequency in photoassociation of ultracold Cs atoms %0 Journal Article %D 2019 %J Chin. Phys. B %R 10.1088/1674-1056/28/1/013702 %P 13702-013702 %V 28 %N 1 %U {https://cpb.iphy.ac.cn/CN/abstract/article_121312.shtml} %8 2019-01-05 %X

We study the influence of external magnetic field on the shift of the resonant frequency in the photoassociation of ultracold Cs atoms, which are captured in a magnetically levitated optical crossed dipole trap. With the increase of the photoassociation laser intensity, the linear variation of the frequency shift is measured by recording the photoassociation spectra of the long-range 0u+ state of Cs molecule below the 6S1/2+6P1/2 dissociation limit at different magnetic fields. The slope of the frequency shift to the intensity of the photoassociation laser exhibits a strong dependence on the external magnetic field. The experimental data is simulated with an analytic theory model, in which a single channel rectangular potential with the tunable well depth is introduced to acquire the influence of the magnetic field on the atomic behavior in the effective range where photoassociation occurs.