Method of the reduced-added Green function in the calculation of atomic polarizabilities

Chernov, V. E.; Dorofeev, D. L.; Kretinin, I. Yu.; Zon, B. A.

doi:10.1103/physreva.71.022505

Cited by 55 publications

(42 citation statements)

References 59 publications

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“…In the cases of transitions with close wavenumbers, we chose those with greater line strength. For the calculation of the oscillator strengths, we used single-channel quantum defect theory (QDT), which has proved its efficiency for the calculation of first- (Alcheev et al 2002) and second- (Chernov et al 2005;Akindinova et al 2009) order matrix elements in atoms and molecules. We tested our QDT technique by comparing the QDT calculations with the experimental oscillator strengths available at NIST (Ralchenko et al 2011 are presented in Table 2 with references to the original papers.…”

Section: Methodsmentioning

confidence: 99%

Potassium spectra in the 700–7000 cm^-1domain: Transitions involving f-, g-, and h-states

Civiš

Ferus

Kubelík

et al. 2012

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Context. The infrared (IR) range is becoming increasingly important to astronomical studies of cool or dust-obscured objects, such as dwarfs, disks, or planets, and in the extended atmospheres of evolved stars. A general drawback of the IR spectral region is the much lower number of atomic lines available (relative to the visible and ultraviolet ranges). Aims. We attempt to obtain new laboratory spectra to help us identify spectral lines in the IR. This may result in the discovery of new excited atomic levels that are difficult to compute theoretically with high accuracy, hence can be determined solely from IR lines. Methods. The K vapor was formed through the ablation of the KI (potassium iodide) target by a high-repetition-rate (1.0 kHz) pulsed nanosecond ArF laser (λ = 193 nm, output energy of 15 mJ) in a vacuum (10 −2 Torr). The time-resolved emission spectrum of the neutral atomic potassium (K i) was recorded in the 700-7000 cm −1 region using the Fourier transform infrared spectroscopy technique with a resolution of 0.02 cm −1 . The f -values calculated in the quantum-defect theory approximation are presented for the transitions involving the reported K i levels. Results. Precision laboratory measurements are presented for 38 K i lines in the infrared (including 25 lines not measured previously in the laboratory) range using time-resolved Fourier transform infrared spectroscopy. The 6g, 6h, and 7h levels of K i are observed for the first time, in addition to updated energy values of the other 23 K i levels and the f -values for the transitions involving these levels. Conclusions. The recorded wave numbers are in good agreement with the data from the available solar spectrum atlases. Nevertheless, we correct their identification for three lines (1343.699, 1548.559, and 1556.986 cm −1 ).

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Section: Methodsmentioning

confidence: 99%

Potassium spectra in the 700–7000 cm^-1domain: Transitions involving f-, g-, and h-states

Civiš

Ferus

Kubelík

et al. 2012

A&A

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“…Large scale calculations using fully correlated Hylleraas basis sets can attain a degree of precision not possible for calculations based on orbital basis sets [19,24,25]. There have been many calculations of the dynamic polarizability for Li [18,[26][27][28][29][30][31][32], but fewer for Be + [28,30]. The present calculation is by far the most precise calculation of the dynamic polarizability that is based upon a solution of the non-relativistic Schrödinger equation.…”

Section: Introductionmentioning

confidence: 92%

Dynamic dipole polarizabilities of the Li atom and the Be+ion

et al. 2010

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The dynamic dipole polarizabilities for the Li atom and the Be + ion in the 2 2 S and 2 2 P states are calculated using the variational method with a Hylleraas basis. The present polarizabilities represent the definitive values in the non-relativistic limit. Corrections due to relativistic effects are also estimated. Analytic representations of the polarizabilities for frequency ranges encompassing the n = 3 excitations are presented. The recommended polarizabilities for 7 Li and 9 Be + were 164.11 ± 0.03 a 3 0 and 24.489 ± 0.004 a 3 0 .

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“…The ac Stark shifts in those experiments have been determined by varying the laser intensity and measuring the resulting change in the Li(2s → 3s) frequency. Unfortunately, while there have been a number of calculations of the Li(2s) ground-state static and dynamic polarizabilities [4][5][6][7][8][9][10][11][12], there have been no first principles calculations of the dynamic polarizabilities of the Li(3s) level that could be used to assess the reliability of the experimental determination of the Stark shift.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Stark shift of the7Li(2s→3s) transition

et al. 2013

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Method of the reduced-added Green function in the calculation of atomic polarizabilities

Cited by 55 publications

References 59 publications

Potassium spectra in the 700–7000 cm^-1domain: Transitions involving f-, g-, and h-states

Potassium spectra in the 700–7000 cm^-1domain: Transitions involving f-, g-, and h-states

Dynamic dipole polarizabilities of the Li atom and the Be+ion

Dynamic Stark shift of the7Li(2s→3s) transition

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Method of the reduced-added Green function in the calculation of atomic polarizabilities

Cited by 55 publications

References 59 publications

Potassium spectra in the 700–7000 cm-1domain: Transitions involving f-, g-, and h-states

Potassium spectra in the 700–7000 cm-1domain: Transitions involving f-, g-, and h-states

Dynamic dipole polarizabilities of the Li atom and the Be+ion

Dynamic Stark shift of the7Li(2s→3s) transition

Contact Info

Product

Resources

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Potassium spectra in the 700–7000 cm^-1domain: Transitions involving f-, g-, and h-states

Potassium spectra in the 700–7000 cm^-1domain: Transitions involving f-, g-, and h-states