Hyperfine quenching of the metastable $^3P_{0,2}$ states in divalent atoms

Details Hyperfine quenching of the metastable $^3P_{0,2}$ states in divalent atoms Hyperfine quenching of the metastable $^3P_{0,2}$ states in divalent atoms

2003-12-02

arxiv.org/abs/physics/0312006v1

Phys. Rev. A 69, 042506 (2004)

Physics

Atomic Physics

10 pages, 1 figure, submitted to Phys. Rev. A

Scientific paper

10.1103/PhysRevA.69.042506

Hyperfine quenching rates of the lowest-energy metastable $^3P_0$ and $^3P_2$ states of Mg, Ca, Sr, and Yb atoms are computed. The calculations are carried out using ab initio relativistic many-body methods. The computed lifetimes may be useful for designing novel ultra-precise optical clocks and trapping experiments with the $3P_2$ fermionic isotopes. The resulting natural widths of the $^3P_0 -> ^1S_0$ clock transition are 0.44 mHz for $^{25}$Mg, 2.2 mHz for $^{43}$Ca, 7.6 mHz for $^{87}$Sr, 43.5 mHz for $^{171}$Yb, and 38.5 mHz for $^{173}$Yb. Compared to the bosonic isotopes, the lifetime of the $3P_2$ states in fermionic isotopes is noticeably shortened by the hyperfine quenching but still remains long enough for trapping experiments.

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