Closing of Coster–Kronig transitions in multiply ionised gold atoms

Banaś, D.; Braziewicz, J.; Czarnota, M.; Fijał, I.; Jaskóła, M.; Korman, A.; Kretschmer, W.; Pajek, M.; Semaniak, J.

doi:10.1016/s0168-583x(03)00549-4

Cited by 13 publications

(12 citation statements)

References 13 publications

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“…In the work of Pajek et al [11,15,55], [11] shows deviations by a factor of nearly 2; they gradually disappear only at higher energies where multiple ionizations are of diminishing importance as the probability of outer shell ionization P given by Eq. (10) decreases with increasing projectile energy to the small values which Pajek et al have inferred from their procedures.…”

Section: Ecusar Hencementioning

confidence: 99%

Effects of multiple ionization and intrashell coupling inL-subshell ionization by heavy ions

et al. 2004

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L-subshell ionization cross sections are extracted from measured L␣, L␤, L␥, L␥ 1 , L␥ 23 , and L␥ 44 x-ray production cross sections in thin targets of 75 Re, 78 Pt, and 79 Au bombarded by 4 -8 MeV C 3+ ions. For each projectile energy, using the fluorescence and Coster-Kronig yields recently recommended by Campbell with an amendment for multiple ionization effects, a mutually consistent set of ionization cross sections is extracted from L␣ and six pairs of other L-line x-ray production cross sections. Extracted L 1 -, L 2 -, L 3 -ionization cross sections are compared with the predictions of the ECPSSR theory-which accounts for the energy ͑E͒ loss and Coulomb ͑C͒ deflection of the projectile as well as for perturbed-stationary state (PSS) and relativistic ͑R͒ nature of L subshells-and its modification, ECUSAR-IS. In the ECUSAR-IS theory, the PSS effect is calculated with a united and separated atom (USA) treatment and the intrashell (IS) coupling is accounted for by multiplicative factors of Sarkadi and Mukoyama normalized so that the sum of L-subshell ECUSAR-IS cross sections equals ECUSAR L-shell ionization cross section without the IS correction. Further improvement of this theory to account for better wave functions in its evaluation is made by scaling it with ratios of DiracHartree-Slater cross sections to the screened hydrogenic formulas used in the ECPSSR theory. Very good agreement is obtained with L 2 and L 3 ionization data. For the L 1 subshell, the data are in good agreement with the ECPSSR theory but are by factors of 2 to 3 above the results of its modifications.

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Section: Ecusar Hencementioning

confidence: 99%

Effects of multiple ionization and intrashell coupling inL-subshell ionization by heavy ions

et al. 2004

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“…As demonstrated below, the vacancy rearrangement processes, i.e., the time evolution of the vacancy distribution in multiply ionized atoms, can be described in terms of atomic decay rates for the radiative and radiationless Auger and Coster-Kronig transitions, these transitions being themselves influenced by multivacancy states. As a consequence, in order to interpret correctly the measured x-ray spectra in terms of the collision-induced multiple ionization, the inner-shell vacancy rearrangement processes will be first discussed hereafter, following a method developed earlier [59,60].…”

Section: Effects Of Multiple Ionizationmentioning

confidence: 99%

“…(12) for a given shell represents a system of differential equations that can be solved analytically, starting from the first lowest subshell. The number of vacancies n i (j ) in the subshell i of the considered shell at the moment of the x-ray emission decaying a vacancy in the shell j can be calculated as the time-averaged number of vacancies n i (t) with respect to the lifetime of the state j [59,60]:…”

Section: A Vacancy Rearrangement Processesmentioning

confidence: 99%

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Satellite and hypersatellite structures ofLα1,2andLβ1x-ray transitions in mid-
Czarnota
¹
,
Banaś
²
,
Berset
³

et al. 2013
Phys. Rev. A

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A detailed investigation of the Lα 1,2 (L 3 →M 4,5) and Lβ 1 (L 2 →M 4) x-ray satellite and hypersatellite structures in zirconium, molybdenum, and palladium atoms multiply ionized by impact with 278.6-MeV oxygen ions is reported. The x-ray spectra were measured with a high-resolution von Hamos bent crystal spectrometer. For the interpretation of the complex spectral features, relativistic multiconfiguration Dirac-Fock calculations were performed for all multivacancy configurations expected to contribute to the observed spectra. The data analysis clearly demonstrates that the spectra are dominated by structures originating from (L −1 M −m N −n) satellite and (L −2 M −m N −n) hypersatellite transitions corresponding to the radiative decay of the excited multivacancy configurations. The ionization probabilities of the L and M shell were determined from the data and compared with theoretical predictions from the geometrical model and the semiclassical approximation, using in the latter case both relativistic hydrogenlike and self-consistent Dirac-Hartree-Fock wave functions. The results support the independent electron picture of the multiple ionization. They also show the importance of using relativistic and self-consistent electronic wave functions for the L and M shells.

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“…The total rate for a higher ionisation degree is calculated by taking the other numbers of electrons in the shells and supposing the second factor is constant or by linearly extrapolating the latter. However, the closing of some low energy Auger transitions can substantially change the fluorescence and Auger yields [11]. It is checked usually from the average energy calculations for considered configurations.…”

Section: Introductionmentioning

confidence: 99%

Closing of Coster–Kronig transitions and variation of fluorescence and Auger yields in isonuclear sequence of tungsten

Kučas

Karazija²

2011

Lith. J. Phys.

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The dependence of Auger yields, partial and total Auger widths of levels, total radiative widths, and fluorescence yields on the ionisation degree is considered for ions of tungsten. The calculations are performed for the Ni subshells in the single configuration quasirelativistic approximation. The intervals of ionisation stages at which the Coster-Kronig transitions are energetically possible or partially possible are determined. It is shown that the partially possible Coster-Kronig transitions between overlapping initial and final configurations can take place in several neighbouring ions successively. According to our calculation results, the nonradiative decay of vacancies in Ni subshells becomes impossible from ionisation stage q = 21. The total Auger width depends weakly on ionisation degree up to its values q = 8-11, but for higher ions changes non-monotonically due to closing of Coster-Kronig transitions. The fluorescence yield shows the similar dependence on q.

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Closing of Coster–Kronig transitions in multiply ionised gold atoms

Cited by 13 publications

References 13 publications

Effects of multiple ionization and intrashell coupling inL-subshell ionization by heavy ions

Effects of multiple ionization and intrashell coupling inL-subshell ionization by heavy ions

Satellite and hypersatellite structures ofLα1,2andLβ1x-ray transitions in mid-
Czarnota
¹
,
Banaś
²
,
Berset
³

et al. 2013
Phys. Rev. A

Closing of Coster–Kronig transitions and variation of fluorescence and Auger yields in isonuclear sequence of tungsten

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Closing of Coster–Kronig transitions in multiply ionised gold atoms

Cited by 13 publications

References 13 publications

Effects of multiple ionization and intrashell coupling inL-subshell ionization by heavy ions

Effects of multiple ionization and intrashell coupling inL-subshell ionization by heavy ions

Satellite and hypersatellite structures ofLα1,2andLβ1x-ray transitions in mid-Czarnota1, Banaś2, Berset3 et al. 2013Phys. Rev. A

Closing of Coster–Kronig transitions and variation of fluorescence and Auger yields in isonuclear sequence of tungsten

Contact Info

Product

Resources

About

Satellite and hypersatellite structures ofLα1,2andLβ1x-ray transitions in mid-
Czarnota
¹
,
Banaś
²
,
Berset
³

et al. 2013
Phys. Rev. A