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Determination of the 5d6p 3F4-5d2 3F transition probabilities of Ba I
Authors:Jia-qi Zhong  Geng-hua Yu  Jin Wang  Ming-sheng Zhan
Institution:1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071, China
2. Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan, 430071, China
3. Graduate University of the Chinese Academy of Sciences, Beijing, 100049, China
Abstract:Whether the transitions between 6s5d 3D and 5d6p 3F can be used for laser cooling of barium heavily depends upon the transition probabilities of 5d6p 3F-5d2 3F. Taking the transition 6s5d 3D3-5d6p 3F4 as a scale, the leakage rate of 5d6p 3F4-5d2 3F was used to evaluate the transition probabilities. 706 nm laser pulses with different durations were applied to a barium atomic beam for 6s5d 3D3-5d2 3F4 optical pumping, and the remaining percentages in 6s5d 3D3 were measured. After exponential fitting, the transition probability of 5d6p 3F4-5d2 3F3,4 was determined to be 2.1(4)×104 s?1, which is in agreement with theoretical calculations using the scaled Thomas-Fermi-Dirac method.
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