Combining experiments and relativistic theory for establishing accurate radiative quantities in atoms: the lifetime of the ²P_3/2 state in ⁴⁰Ca⁺

2019/09/30 by Ziv Meir, Mudit Sinhal, Marianna S. Safronova +1 · 1 citation
Physics and Astronomy · #physics.atom-ph #quant-ph

paper · pdf · doi:10.1103/physreva.101.012509

published as Phys. Rev. A 101, 012509 (2020)

arxiv created 2019/10/02 · arxiv updated 2020/01/22

Abstract

We report a precise determination of the lifetime of the (4p)²P_3/2 state of ⁴⁰Ca⁺, τ_\textrmP_3/2=6.639(42) ns, using a combination of measurements of the induced light shift and scattering rate on a single trapped ion. Good agreement with the result of a recent high-level theoretical calculation, 6.69(6) ns [Safronova et al., PRA 83, 012503 (2011)], but a 6-σ discrepancy with the most precise previous experimental value, 6.924(19) ns [Jin et al., PRL 70, 3213 (1993)] is found. To corroborate the consistency and accuracy of the new measurements, relativistically corrected ratios of reduced-dipole-matrix elements are used to directly compare our result with a recent result for the P_1/2 state, yielding a good agreement. The application of the present method to precise determinations of radiative quantities of molecular systems is discussed.

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