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Rafac, Robert J.; Tanner, Carol E.; Livingston, A. E.; Kukla, K.W.; Berry, H. G.; Kurtz, C.

doi:10.1103/physreva.50.r1976

Cited by 69 publications

(41 citation statements)

References 13 publications

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“…Several experimental [17,26,27,28] and theoretical [29,30,31,32] works have been devoted to the determination of the dipole matrix elements. In particular, the measurement of the excited states |6P 1/2 and |6P 3/2 lifetimes provides a direct method to know the reduced matrix elements through the well-known expression of the spontaneous emission: Table 4.…”

Section: Numerical Evaluationmentioning

confidence: 99%

Blackbody radiation shift of theCs133hyperfine transition frequency

et al. 2004

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We report the theoretical evaluations of the static scalar polarizability of the 133 Cs ground state and of the black body radiation shift induced on the transition frequency between the two hyperfine levels with m F = 0. This shift is of fundamental importance in the evaluation of the accuracy of the primary frequency standards based on atomic fountains and employed in the realization of the SI second in the International Atomic Time (TAI) scale at the level of 1 × 10 −15 .Our computed value for the polarizability is α 0 = (6.600±0.016)×10 −39 Cm 2 /V in agreement at the level of 1×10 −3 with recent theoretical and experimental values. As regards the black body radiation shift we find for the relative hyperfine transition frequency β = (−1.49 ± 0.07) × 10 −14 at T = 300 K in agreement with frequency measurements reported by our group and by Bauch and Schröder [Phys. Rev. Lett. 78, 622, (1997)]. This value is lower by 2 × 10 −15 than that

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Section: Numerical Evaluationmentioning

confidence: 99%

Blackbody radiation shift of theCs133hyperfine transition frequency

et al. 2004

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“…In a second, more precise, calculation we dropped all the simplifying assumptions mentioned above [8], still keeping diagonal matrix elements only, and numerically evaluated Eqs. (13,14) by using recent experimental values [13] of the reduced dipole matrix elements 6S 1/2 d 6P j . As a result, the discrepancy with experiments becomes even larger [point (f") in Fig.…”

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confidence: 99%

Reconciliation of experimental and theoretical electric tensor polarizabilities of the cesium ground state

et al. 2006

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Abstract. -We present a new theoretical analysis of the strongly suppressed F -and Mdependent Stark shifts of the Cs ground state hyperfine structure. Our treatment uses third order perturbation theory including off-diagonal hyperfine interactions not considered in earlier treatments. A numerical evaluation of the perturbation sum using bound states up to n=200 yields ground state tensor polarizabilities α2(6S 1/2 , F ) which are in good agreement with experimental values, thereby bridging the 40-year-old gap between experiments and theory. We have further found that the tensor polarizabilities of the two ground state hyperfine manifolds have opposite signs, in disagreement with an earlier derivation. This sign error has a direct implication for the precise evaluation of the blackbody radiation shift in primary frequency standards.Introduction. -Since its discovery, the Stark effect, i.e., the interaction of an atom with an external electric field E, has played an important role in the spectroscopic investigation of atomic structure. Because of parity conservation, the Stark effect arises only in second order perturbation theory for atoms with non-degenerate orbital angular momentum states. The energy shift ∆E(γ) of a magnetic sublevel |γ = |nL J , F, M of the hyperfine structure is conventionally parametrized in terms of a polarizability α(γ) as

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“…The obtained values for the free Cs atom and for Cs in a spherical He bubble are listed in Table 1, together with the transition wavelengths and the lifetimes. For the free Cs atom we obtain a lifetime which is approximately 4% larger than the precise experimental value of [16,17]. This sets a scale for the precision of our model calculations.…”

Section: Theorymentioning

confidence: 74%

Lifetime of the Cs 6P1/2 state in bcc and hcp solid 4He

et al. 2007

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Abstract. We present the first experimental study of time-resolved fluorescence from laser-excited Cs(6P 1/2 ) atoms isolated in a solid 4 He matrix. The results are compared to the predictions of the bubble model including the interaction of the atomic dipole with its radiation reflected at the bubble interface. Our results show that in liquid He as well as in the body-centered cubic (bcc) crystalline phase of He the lifetime of excited Cs atoms does not depend on He pressure, in agreement with our theory. When going from the bcc to the hexagonally close-packed (hcp) phase of 4 He the lifetime is reduced by ≈10% and decreases further with increasing He pressure. We assign this effect to the formation of Cs * Hen exciplexes, and determine the pressure dependence of the probability that the 6P 1/2 state decays via this nonradiative channel.

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Precision lifetime measurements of the 6p2P1/2,3

Cited by 69 publications

References 13 publications

Blackbody radiation shift of theCs133hyperfine transition frequency

Blackbody radiation shift of theCs133hyperfine transition frequency

Reconciliation of experimental and theoretical electric tensor polarizabilities of the cesium ground state

Lifetime of the Cs 6P1/2 state in bcc and hcp solid 4He

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