Spectral analysis of the 4d95d and 4d95f configurations in octuple ionization of xenon, Xe IX

Callegari, F.A.; Gallardo, M.; Raineri, M.; Trigueiros, A. G.; Almandos, J. G. Reyna

doi:10.1016/s0022-4073(01)00165-0

Cited by 9 publications

(7 citation statements)

References 10 publications

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“…In ref. 15, the authors confirm the classification in ref. 14 and adjust the energy level values involved in the laser scheme structure.…”

Section: Introductionsupporting

confidence: 83%

“…14 and adjust the energy level values involved in the laser scheme structure. One hundred and nine transitions were identified as combinations between levels of the 4d 9 5d with 4d 9 5p and 4d 9 5f configurations [15]. The energy parameters were obtained with Hartree-Fock relativistic calculations.…”

Section: Introductionmentioning

confidence: 99%

“…The energy parameters were obtained with Hartree-Fock relativistic calculations. Least-squares parametric calculation were carried out to study the fit between experimental and theoretical values [15]. The radiation from Pd-like W 28+ in the extreme ultraviolet spectral region was investigated using a 2 m grazing-incidence spectrometer in conjunction with the Berlin EBIT [16].…”

Section: Introductionmentioning

confidence: 99%

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Relativistic many-body calculations of atomic properties in Pd-like ions

Safronova¹,

Bista²,

Bruch³

et al. 2008

Can. J. Phys.

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Wavelengths, transition rates, and line strengths are calculated for the 85 possible multipole transitions between the excited 4p 6 4d 9 4f , 4p 6 4d 9 5l, 4p 5 4d 10 4f , and 4p 5 4d 10 5l states and the ground 4p 6 4d 10 state in Pd-like ions with the nuclear charges ranging from Z = 47 to 100. Relativistic many-body perturbation theory (RMBPT), including the Breit interaction, is used to evaluate energies and transition rates for multipole transitions in hole-particle systems. This method is based on the relativistic many-body perturbation theory, agrees with MCDF calculations in lowest order, includes all second-order correlation corrections, and includes corrections from negative energy states. The calculations start from a [Zn]4p 6 4d 10 Dirac-Fock potential. First-order perturbation theory is used to obtain intermediate-coupling coefficients, and second-order RMBPT is used to determine the matrix elements. The contributions from negative-energy states are included in the second-order multipole matrix elements. The resulting transition energies and transition rates are compared with experimental values and with results from other recent calculations. Trends of the transitions rates for the selected multipole transitions as function of Z are illustrated graphically. The Z dependence of the energy splitting for all triplet terms of the 4p 6 4d 9 4f and 4p 6 4d 9 5l configurations are shown for Z = 47-100. PACS Nos.: 31.15.Ar, 31.15.Md, 32.70.Cs, 32.30.Rj, 31.25.Jf Résumé : Nous avons calculé les longueurs d'onde, les taux de transition et les intensités de ligne pour les 85 transitions multipolaires possibles entre les états excités 4p 6 4d 9 4f,4p 6 4d 9 5l et 4p 5 4d 10 5l et le fondamental dans des ions de type Pd avec charge nucléaire Z = 47 à 100. Nous utilisons une théorie perturbative relativiste à N-corps (RMBPT), incluant une interaction de Breit, pour évaluer les énergies et les taux des transition multipolaires dans ces systèmes à particules-trous. Cette méthode est basée sur la théorie perturbative relativiste à N -corps ; elle agrée avec les calculs MCDF à l'ordre le plus bas et inclut toutes les corrections de corrélation au second ordre, ainsi que les corrections pour les états d'énergie négative. Les calculs débutent avec un potentiel de Dirac-Fock pour le [Zn]4p 6 4d 10 . Nous utilisons d'abord la méthode perturbative au premier ordre pour calculer les coefficients de couplage intermédiaire et ensuite RMBPT au deuxième ordre pour déterminer les éléments de matrice. Les contributions venant des états d'énergie négative sont incluses dans les éléments de matrice multipolaire au second ordre. Nous comparons avec d'autres calculs nos résultats pour les énergies de transition et les taux de transition. Nous illustrons graphiquement en fonction de Z les tendances des taux de transition pour les multipoles sélectionnés. Nous donnons aussi les énergies de séparation pour tous les termes triplets des configurations 4p 6 4d 9 4f et 4p 6 4d 9 5l pour Z = 47 à 100.[Traduit par la Rédaction]

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“…In ref. 15, the authors confirm the classification in ref. 14 and adjust the energy level values involved in the laser scheme structure.…”

Section: Introductionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Relativistic many-body calculations of atomic properties in Pd-like ions

Safronova¹,

Bista²,

Bruch³

et al. 2008

Can. J. Phys.

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“…The low-pressure capillary discharge is similar to that used to study the spectra of highly ionized xenon [18,19] and recently, in our laboratory, for the investigation of Stark broadening of N II and O III lines [20]. In this experiment, we use a quartz discharge tube, with a 3 mm inner diameter, and aluminium electrodes (with 3 mm diameter holes) located 200 mm apart.…”

Section: Experimental Set-up and Proceduresmentioning

confidence: 99%

“…The discharge is driven by a 0.36 µF low inductance capacitor charged to 7 kV and fired by a deuterium-filled thyratron EEV CX 1154, instead of a spark gap [18,19]. Using the described circuitry, a discharge current shape with a peak of 400 A and with 2.7 µs duration is obtained, see figure 1.…”

Section: Experimental Set-up and Proceduresmentioning

confidence: 99%

On the Stark broadening of Ne I lines and quasi-static versus ion impact approximation

Jovičević¹,

Ivković²,

Žikić³

et al. 2005

J. Phys. B: At. Mol. Opt. Phys.

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A pulsed low-pressure capillary discharge operated in neon, helium and hydrogen gas mixture was used as the source of a high-density plasma with predominantly protons as ions for the measurement of the spectral line profiles of 13 isolated Ne I lines. An electron density of 4.8 × 1022 m−3 with an estimated uncertainty of 10% was determined from the profiles of three He I lines, while an electron temperature of 33 000 K, with an uncertainty of 12%, was measured using the relative intensities of O II impurity lines. The experimental widths of symmetric Ne I profiles are compared with data of two semiclassical calculations using quasi-static and ion impact approximations. The average ratio of measured to theoretical line widths is approximately the same for both theoretical approaches, showing good agreement in either case. This agreement with both theories must be considered, however, to be accidental, for the following reason. In one theory, the electron impact widths are relatively larger with small quasi-static ion contribution, while the other approach produces relatively smaller electron and larger ion impact widths. The asymmetric He I line profiles prove that the semiclassical theoretical approach with quasi-static ion approximation describes better the experimental Stark profiles of He I and Ne I lines. Contrary to the recently reported experimental Ne I line shapes, all studied profiles are symmetric within experimental uncertainty. Possible causes for the line asymmetry and discrepancy of Stark widths with data of this experiment are traced to the plasma source inhomogeneity and plasma diagnostics. Good agreement with several other experiments is detected.

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