Electric-dipole amplitudes, lifetimes, and polarizabilities of the low-lying levels of atomic ytterbium

Porsev, S. G.; Rakhlina, Yu. G.; Kozlov, M. G.

doi:10.1103/physreva.60.2781

Cited by 112 publications

(96 citation statements)

References 34 publications

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“…The computational procedure is similar to calculations of hyperfine structure constants and electric-dipole amplitudes for atomic ytterbium [35,36] [37]. One-electron basis set for Mg included 1s-13s, 2p-13p, 3d-12d, and 4f -11f orbitals, where the core-and 3,4s, 3,4p, 3,4d, and 4f orbitals were Dirac-Hartree-Fock (DHF) ones, while all the rest were virtual orbitals.…”

Section: Methods Of Calculationsmentioning

confidence: 99%

Many-body calculations of electric-dipole amplitudes for transitions between low-lying levels of Mg, Ca, and Sr

et al. 2001

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To support efforts on cooling and trapping of alkaline-earth atoms and designs of atomic clocks, we performed ab initio relativistic many-body calculations of electric-dipole transition amplitudes between low-lying states of Mg, Ca, and Sr. In particular, we report amplitudes, and for 3 P o 2 → 1 D 2 transitions. For Ca, the reduced matrix element 4s4p 1 P o 1 ||D||4s 2 1 S 0 is in a good agreement with a high-precision experimental value deduced from photoassociation spectroscopy [Zinner et al., Phys. Rev. Lett. 85, 2292 ]. An estimated uncertainty of the calculated lifetime of the 3s3p 1 P o 1 state of Mg is a factor of three smaller than that of the most accurate experiment. Calculated binding energies reproduce experimental values within 0.1-0.2%.

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Section: Methods Of Calculationsmentioning

confidence: 99%

Many-body calculations of electric-dipole amplitudes for transitions between low-lying levels of Mg, Ca, and Sr

et al. 2001

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“…[19,20] and subsequently developed in [21,22,23,24]. In this method one determines wave functions from solution of the effective many-body Shrödinger equation…”

Section: General Formalismmentioning

confidence: 99%

Accurate relativistic many-body calculations of van der Waals coefficients C8 and C10 for alkali-metal dimers

Porsev

Derevianko

2003

The Journal of Chemical Physics

126

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We consider long-range interactions between two alkali-metal atoms in their respective ground states. We extend the previous relativistic many-body calculations of C 6 dispersion coefficients [Phys. Rev. Lett. 82, 3589 (1999)] to higher-multipole coefficients C 8 and C 10 . A special attention is paid to usually omitted contribution of core-excited states. We calculate this contribution within relativistic random-phase approximation and demonstrate that for heavy atoms core excitations contribute as much as 10% to the dispersion coefficients. We tabulate results for both homonuclear and heteronuclear dimers and estimate theoretical uncertainties. The estimated uncertainties for C 8 coefficients range from 0.5% for Li 2 to 4% for Cs 2 .

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“…In the CI+all-order approach, the valence part of the polarizability is determined by solving the inhomogeneous equation of perturbation theory in the valence space, which is approximated as [25] (…”

Section: Polarizabilitiesmentioning

confidence: 99%

Polarizabilities, Stark shifts, and lifetimes of the In atom

Safronova

Porsev

2013

Phys. Rev. A

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We evaluate the polarizabilities of the 5p 1/2 , 6s, 6p 1/2 , and 6p 3/2 states of In using two different high-precision relativistic methods: linearized coupled-cluster approach where single, double and partial triple excitations of the Dirac-Fock wave function are included to all orders of perturbation theory and an approach that combines the configuration interaction and the coupled-cluster method. Extensive comparison of the accuracy of these methods is carried out. The uncertainties of all recommended values are evaluated. Our result for the 6s−5p 1/2 Stark shift is in excellent agreement with the recent measurement [Ranjit et al., arXiv:1302.0821v1]. Combining our calculation with this precision measurement allows us to infer the values of the 6p 1/2 and 6p 3/2 lifetimes in In with 0.8% accuracy. Our predictions for the 6p 3/2 scalar and tensor polarizabilities may be combined with the future measurement of the 6s − 6p 3/2 Stark shift to accurately determine the lifetimes of the 5dj states.

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Electric-dipole amplitudes, lifetimes, and polarizabilities of the low-lying levels of atomic ytterbium

Cited by 112 publications

References 34 publications

Many-body calculations of electric-dipole amplitudes for transitions between low-lying levels of Mg, Ca, and Sr

Many-body calculations of electric-dipole amplitudes for transitions between low-lying levels of Mg, Ca, and Sr

Accurate relativistic many-body calculations of van der Waals coefficients C8 and C10 for alkali-metal dimers

Polarizabilities, Stark shifts, and lifetimes of the In atom

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