Collisional dynamics of low energy states of atomic strontium following the generation of Sr(5s5p1P1) in the presence of Ne, Kr and Xe

Redondo, Carolina; Rayo, M. N. Sanchez; Écija, Patricia; Husain, D.; Castaño, Fernando

doi:10.1016/j.cplett.2004.03.156

Cited by 11 publications

(11 citation statements)

References 21 publications

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“…The theoretical lifetime of the 1 D 2 state is 0.23 ms, to be compared with the experimental value of 0.30 ms 71 . The same numbers for the average multiplet 3 D are 2.72 µs and 2.5(2) µs 72 . Such a good agreement between theory and experiment for the atoms gives us confidence that the molecular results will be of similar accuracy, i.e., at worst a few percent off from the exact results.…”

Section: Numerical Results and Discussionmentioning

confidence: 94%

“…Finally, we also note that the lifetimes of the 3 P 1 , multiplet 3 D, 1 D 2 , and 1 P 1 states of Sr are accurately reproduced. Our calculated lifetimes together with the most recent experimental and other theoretical results are listed in 72 . Such a good agreement between theory and experiment for the atoms gives us confidence that the molecular results will be of similar accuracy, i.e., at worst a few percent off from the exact results.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

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Rovibrational dynamics of the strontium molecule in the ${\rm A}\sideset{^1}{_{u}^{+}}{\Sigma}$AΣu+1, c3Πu, and ${\rm a}\sideset{^3}{_{u}^{+}}{\Sigma}$aΣu+3 manifold from state-of-the-art ab initio calculations

Skomorowski¹,

Pawłowski²,

Koch³

et al. 2012

The Journal of Chemical Physics

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State-of-the-art ab initio techniques have been applied to compute the potential energy curves for the electronic states in the A(1)Σ(u)(+), c(3)Π(u), and a(3)Σ(u)(+) manifold of the strontium dimer, the spin-orbit and nonadiabatic coupling matrix elements between the states in the manifold, and the electric transition dipole moment from the ground X(1)Σ(g)(+) to the nonrelativistic and relativistic states in the A+c+a manifold. The potential energy curves and transition moments were obtained with the linear response (equation of motion) coupled cluster method limited to single, double, and linear triple excitations for the potentials and limited to single and double excitations for the transition moments. The spin-orbit and nonadiabatic coupling matrix elements were computed with the multireference configuration interaction method limited to single and double excitations. Our results for the nonrelativistic and relativistic (spin-orbit coupled) potentials deviate substantially from recent ab initio calculations. The potential energy curve for the spectroscopically active (1)0(u)(+) state is in quantitative agreement with the empirical potential fitted to high-resolution Fourier transform spectra [A. Stein, H. Knöckel, and E. Tiemann, Eur. Phys. J. D 64, 227 (2011)]. The computed ab initio points were fitted to physically sound analytical expressions, and used in converged coupled channel calculations of the rovibrational energy levels in the A+c+a manifold and line strengths for the A(1)Σ(u)(+)←X(1)Σ(g (+) transitions. Positions and lifetimes of quasi-bound Feshbach resonances lying above the (1)S(0) + (3)P(1) dissociation limit were also obtained. Our results reproduce (semi)quantitatively the experimental data observed thus far. Predictions for on-going and future experiments are also reported.

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Section: Numerical Results and Discussionmentioning

confidence: 94%

Section: Numerical Results and Discussionmentioning

confidence: 99%

Rovibrational dynamics of the strontium molecule in the ${\rm A}\sideset{^1}{_{u}^{+}}{\Sigma}$AΣu+1, c3Πu, and ${\rm a}\sideset{^3}{_{u}^{+}}{\Sigma}$aΣu+3 manifold from state-of-the-art ab initio calculations

Skomorowski¹,

Pawłowski²,

Koch³

et al. 2012

The Journal of Chemical Physics

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“…In particular, there is a correlation in the uncertainty of the BBR shift and the lifetime of the 5s4d 3 D 1 state, if branching ratios are known to sufficient accuracy. At present, experimental measurements of the 5s4d 3 D term-averaged lifetime have an uncertainty of about 7% [14,15]. We note that the experiment [15], which was performed at JILA some 20 years ago, has relevance in the determination of the uncertainty budget of one of the world's most accurate clocks now being developed at the same institution -a development probably not envisaged at the time.…”

Section: Introductionmentioning

confidence: 90%

“…We also list the recommended values 3 D 2 , 3 D 3 , and term-averaged 3 D lifetimes in Table VII. The 3 D term-averaged lifetime is compared with experiment [14,15].…”

Section: Blackbody Radiation Shiftmentioning

confidence: 99%

“…We have combined our theoretical calculations with the experimental measurements of the Stark shift [13] and magic wavelength [3] [14,15]. We note that the experiment [15], which was performed at JILA some 20 years ago, has relevance in the determination of the uncertainty budget of one of the world's most accurate clocks now being developed at the same institution -a development probably not envisaged at the time.…”

Section: Introductionmentioning

confidence: 99%

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Blackbody-radiation shift in the Sr optical atomic clock

et al. 2013

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We evaluated the static and dynamic polarizabilities of the 5s 2 1 S0 and 5s5p 3 P o 0 states of Sr using the high-precision relativistic configuration interaction + all-order method. Our calculation explains the discrepancy between the recent experimental 5s 2 1 S0 − 5s5p 3 P o 0 dc Stark shift measurement ∆α = 247.374(7) [Middelmann et. al, arXiv:1208.2848] and the earlier theoretical result of 261(4) a.u. [Porsev and Derevianko, Phys. Rev. A 74, 020502R (2006)]. Our present value of 247.5 a.u. is in excellent agreement with the experimental result. We also evaluated the dynamic correction to the BBR shift with 1% uncertainty; -0.1492(16) Hz. The dynamic correction to the BBR shift is unusually large in the case of Sr (7%) and it enters significantly into the uncertainty budget of the Sr optical lattice clock. We suggest future experiments that could further reduce the present uncertainties.

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Time-dependent fundamental processes following ns pulsed laser absorption by metallic targets

Castaño¹,

Écija²,

Apiñaniz³

et al. 2010

Chemical Physics Letters

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Collisional dynamics of low energy states of atomic strontium following the generation of Sr(5s5p1P1) in the presence of Ne, Kr and Xe

Cited by 11 publications

References 21 publications

Rovibrational dynamics of the strontium molecule in the ${\rm A}\sideset{^1}{_{u}^{+}}{\Sigma}$AΣu+1, c3Πu, and ${\rm a}\sideset{^3}{_{u}^{+}}{\Sigma}$aΣu+3 manifold from state-of-the-art ab initio calculations

Rovibrational dynamics of the strontium molecule in the ${\rm A}\sideset{^1}{_{u}^{+}}{\Sigma}$AΣu+1, c3Πu, and ${\rm a}\sideset{^3}{_{u}^{+}}{\Sigma}$aΣu+3 manifold from state-of-the-art ab initio calculations

Blackbody-radiation shift in the Sr optical atomic clock

Time-dependent fundamental processes following ns pulsed laser absorption by metallic targets

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