Fine and Hyperfine Structure of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>2</mml:mn><mml:mi> </mml:mi><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>P</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>2</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>Term of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Li</mml:mi></mml:mrow>

Brog, K. C.; Eck, T. G.; Wieder, H.

doi:10.1103/physrev.153.91

Cited by 125 publications

(20 citation statements)

References 24 publications

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“…[10] and also with Refs. [20,21], but are in disagreement with all the other ones. This demonstrates the capability of NRQED theory and the numerical approach based on explicitly correlated functions in achieving high-precision predictions for energies and energy splittings in light, few-electron atoms.…”

Section: Discussionmentioning

confidence: 60%

Quantum Electrodynamics Corrections to the2PFine Splitting in Li

Puchalski

Pachucki

2014

Phys. Rev. Lett.

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We consider quantum electrodynamics (QED) corrections to the fine splitting E(2P 3/2 ) − E(2P 1/2 ) in the Li atom. We derive complete formulas for the m α 6 and m α 7 ln α contributions and calculate them numerically using highly optimized, explicitly correlated basis functions. The obtained results resolve disagreement between measurements and lay the foundations for investigation of QED effects in light, many-electron atoms.

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Section: Discussionmentioning

confidence: 60%

Quantum Electrodynamics Corrections to the2PFine Splitting in Li

Puchalski

Pachucki

2014

Phys. Rev. Lett.

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“…The fine structure splitting of the lower state 22P has been measured to be 10.053GHz [12] and that of the upper state 32D to be 1.074GHz [13]. Therefore we have to expect two close lying lines resulting from transitions 3205/2---~22P3, 2 and 32D3/2---~2 2/)3/2 which only differ in their wavelengths by 0.…”

Section: (1--exp(--wk(l+g"]6))'qk'7mentioning

confidence: 97%

Fast-beam-spectroscopy by combined gas cell-laser excitation for cascade-free lifetime measurements of highly excited states

et al. 1977

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The fast-beam-spectroscopy is used for cascade-free high-precision lifetime measurements of highly excited atomic states, which are populated by a two-stage excitation as resulting from gas cell and laser interactions. An experimental extension of the method is presented demonstrating the selective population of high lying levels even from shorterliving intermediate states by an intracavity dye-laser excitation. A first example for this type of experiments is given for the lifetime of the Li 3d 2D level, which was determined to be ~(3 2D)= 14.60_+0.13 ns. The appropriate experimental set-up is described in detail and an approximate expression for signal calculation is presented, by which the applicability of this method to other levels can be estimated.

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“…The levels with the same μ cannot cross due to the small interaction that takes place between them. This interaction is determined by the off-diagonal elements of the magnetic hyperfine interaction Hamiltonian which couple the states with different J values (Brog et al 1967;Arimondo et al 1977). A rapid transformation in the eigenvector basis takes place around the region of avoided crossing.…”

Section: Level-crossings and Avoided Crossingsmentioning

confidence: 99%

Polarized Scattering of Light for Arbitrary Magnetic Fields With Level-Crossings From the Combination of Hyperfine and Fine Structure Splittings

Sowmya

Nagendra

Sampoorna

et al. 2015

ApJ

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Interference between magnetic substates of the hyperfine structure states belonging to different fine structure states of the same term influences the polarization for some of the diagnostically important lines of the Sunʼs spectrum, like the sodium and lithium doublets. The polarization signatures of this combined interference contain information on the properties of the solar magnetic fields. Motivated by this, in the present paper, we study the problem of polarized scattering on a two-term atom with hyperfine structure by accounting for the partial redistribution in the photon frequencies arising due to the Doppler motions of the atoms. We consider the scattering atoms to be under the influence of a magnetic field of arbitrary strength and develop a formalism based on the Kramers-Heisenberg approach to calculate the scattering cross section for this process. We explore the rich polarization effects that arise from various level-crossings in the Paschen-Back regime in a single scattering case using the lithium atomic system as a concrete example that is relevant to the Sun.

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Fine and Hyperfine Structure of the2 P2Term ofLi

Cited by 125 publications

References 24 publications

Quantum Electrodynamics Corrections to the2PFine Splitting in Li

Quantum Electrodynamics Corrections to the2PFine Splitting in Li

Fast-beam-spectroscopy by combined gas cell-laser excitation for cascade-free lifetime measurements of highly excited states

Polarized Scattering of Light for Arbitrary Magnetic Fields With Level-Crossings From the Combination of Hyperfine and Fine Structure Splittings

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