Determination of the 5d6p ³F₄–5d^{2 3}F transition probabilities of Ba I

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-5d²³F. Taking the transition 6s5d ³D32-5d6p ³F4 as a scale, the leakage rate of 5d6p ³F4-5d²³F was used to evaluate the transition probabilities. 706 nm laser pulses with different durations were applied to a barium atomic beam for 6s5d³D3-5d ^{2 3}F4 optical pumping, and the remaining percentages in 6s5d ³D₃ were measured. After exponential fitting, the transition probability of 5d6p ³F4-5d^{2 3}F_3,4 was determined to be 2.1(4)×10⁴ s^-1, which is in agreement with theoretical calculations using the scaled Thomas–Fermi–Dirac method.

Keywords

laser cooling / leakage rate / transition probability / scaled Thomas–Fermi–Dirac method

References

[1] M. M. Boyd, A. D. Ludlow, S. Blatt, S. M. Foreman, T. Ido, T. Zelevinsky, and J. Ye, Phys. Rev. Lett., 2007, 98(8): 083002

[2] S. De, U. Dammalapati, K. Jungmann, and L. Willmann, Phys. Rev. A, 2009, 79(4): 041402(R)

[3] J. Migdalek and W. E. Baylis, Phys. Rev. A, 1990, 42(11): 6897

[4] G. Garcia and J. Campos, J. Quant. Spectrosc. Radiat. Transf., 1989, 42(6): 567

[5] J. C. Stewart and M. Rotenberg, Phys. Rev. A, 1965, 140(5): A1508

[6] G. K. Oertel and L. P. Shomo, Astrophys. J. Suppl. Ser., 1968, 16: 175

[7] R. Latter, Phys. Rev., 1955, 99(2): 510

[8] B. Numerov, Publ. Observ. Central Astrophys. Russ., 1933, 2: 188

[9] D. Kulaga, J. Migdalek, and O. Bar, J. Phys. B: Mol. Opt. Phys., 2001, 34(23): 4775

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