Atomic data for doubly-excited states <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si302.gif" display="inline" overflow="scroll"><mml:mn>2</mml:mn><mml:mi>l</mml:mi><mml:mi>n</mml:mi><mml:msup><mml:mrow><mml:mi>l</mml:mi></mml:mrow><mml:mrow><mml:mo>′</mml:mo></mml:mrow></mml:msup></mml:math> of He-like ions and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si303.gif" display="inline" overflow="scroll"><mml:mn>1</mml:mn><mml:mi>s</mml:mi><mml:mn>2</mml:mn><mml:mi>l</m

Goryaev, F. F.; Vaĭnshteĭn, L. A.; Urnov, A. M.

doi:10.1016/j.adt.2016.04.002

Cited by 31 publications

(34 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For brevity, only the transition rates in the Babushkin gauge are given in the table. The current calculated transition rates are in good agreement with the result calculated by Kadrekar and Natarajan using the MCDF method [29] and by Goryaev et al using the Z-expansion method [47]. The Z-expansion method is based on perturbation theory and a hydrogen-like basis, while MCDF includes electron correlation effectively.…”

Section: Resultssupporting

confidence: 87%

Effects of electron correlation and the Breit interaction on one- and two-electron one-photon transitions in double K hole states of He-like ions (10 ≤ Z ≤ 47)*

Ding

Cao

et al. 2020

Chinese Phys. B

View full text Add to dashboard Cite

The x-ray energies and transition rates associated with single and double electron radiative transitions from the double K hole state 2s2p to the 1s2s and 1s 2 configurations of 11 He-like ions (10 ≤ Z ≤ 47) are evaluated using the fully relativistic multi-configuration Dirac-Fock method. An appropriate electron correlation model is constructed with the aid of the active space method, which allows the electron correlation effects to be studied efficiently. The contributions of electron correlation and the Breit interaction to the transition properties are analyzed in detail. It is found that the two-electron one-photon (TEOP) transition is correlation sensitive. The Breit interaction and electron correlation both contribute significantly to the radiative transition properties of the double K hole state of He-like ions. Good agreement between the present calculation and previous work is achieved. The calculated data will be helpful to future investigations on double K hole decay processes of He-like ions.

show abstract

Section: Resultssupporting

confidence: 87%

Effects of electron correlation and the Breit interaction on one- and two-electron one-photon transitions in double K hole states of He-like ions (10 ≤ Z ≤ 47)*

Ding

Cao

et al. 2020

Chinese Phys. B

View full text Add to dashboard Cite

show abstract

“…In particular, the energies of the 1s2lnl states for n = 2, 3 and their E1 and Auger transition rates to 1s 2 nl and 1s 2 , respectively have been reported by Cheng [50] and Chen [51] using the multi-configuration Dirac-Fock method (MCDF). Also by Vainshtein and Safronova [52], Safronova and Bruch [53], and most recently by Goryaev et al [54], using the Z-expansion method. Davis and Chung [55] presented results for the spin-induced autoionization and radiative transition rates for the 1s2s2p 4 P J states using the saddle-point complex rotation method.…”

Section: Decay Rates and Radiative Branching Ratios For C 3+ [(1s2s 3mentioning

confidence: 99%

Radiative Cascade Repopulation of 1s2s2p 4P States Formed by Single Electron Capture in 2–18 MeV Collisions of C4+ (1s2s 3S) with He

Zouros

Nikolaou

Madesis

et al. 2020

Atoms

View full text Add to dashboard Cite

This study focuses on the details of cascade repopulation of doubly excited triply open-shell C3+(1s2s2p)4P and 2P± states produced in 2–18 MeV collisions of C4+(1s2s3S) with He. Such cascade calculations are necessary for the correct determination of the ratio R of their cross sections, used as a measure of spin statistics [Madesis et al. PRL 124 (2020) 113401]. Here, we present the details of our cascade calculations within a new matrix formulation based on the well-known diagrammatic cascade approach [Curtis, Am. J. Phys. 36 (1968) 1123], extended to also include Auger depopulation. The initial populations of the 1s2snℓ4L and 1s2snℓ2L levels included in our analysis are obtained from the direct nℓ single electron capture (SEC) cross sections, calculated using the novel three-electron close-coupling (3eAOCC) approach. All relevant radiative branching ratios (RBR) for n≤4 were computed using the COWAN code. While doublet RBRs are found to be very small, quartet RBRs are found to be large, indicating cascade feeding to be important only for quartets, consistent with previous findings. Calculations including up to third order cascades, extended to n→∞ using an n−3 SEC model, showed a ∼60% increase of the 1s2s2p4P populations due to cascades, resulting, for the first time, in R values in good overall agreement with experiment.

show abstract

“…In addition to the present theoretical calculations and for comparison, the DR contributions arising from the 2s 2 1 S and 2s2p 3 P o resonance terms were inferred from the decay rates provided by Goryaev et al [31] using Eq. 16.…”

Section: Configmentioning

confidence: 99%

“…The quantities that can be compared are the level energies E relative to the C 4+ (1s2s 3 S) initial state, the Auger rates Aa and the total radiative rates Ar. The present theory data are marked by the superscript "this work", those of Goryaev, Vainshtein and Urnov [31] by the superscript "GVU". Numbers in square brackets are powers of 10.…”

Section: Configmentioning

confidence: 99%

“…This fraction has been used for calculating the entry of S(2s2p 3 P ) = 28.1 kb eV in the last row. Comparison with the DR measurement instead would have resulted in f = 0.108. data source S(2s2p 3 P ) S(2s 2 1 S) Σ Present MBPT and CR theory 28.1 1.4 29.5 Inferred from Z-expansion decay rates [31] 28.3 1.4 29.7 DR experiment with C 5+ ions [92] 28.7-1.4=27.3 28.7 present time-reversed photoionization 28.1 toionization data and, hence, also for the fraction f = 0.105 of 1s2s 3 S metastable ions in the C 4+ beam that was employed in the photoionization experiments.…”

Section: Configmentioning

confidence: 99%

See 1 more Smart Citation

Photoionization of metastable heliumlike C4+(1s2sS13
Müller
¹
,
Lindroth
²
,
Bari³
et al. 2018
Phys. Rev. A
41
0
42
0
View full text Add to dashboard Cite

In a joint experimental and theoretical endeavour, photoionization of metastable C 4+ (1s2s 3 S1) ions via intermediate levels with hollow, double-K -vacancy configurations 2s2p, 2s3p, 2p3s, 2p3d, 2s4p, 2p4s and 2p4d has been investigated. High-resolution photon-ion merged-beams measurements were carried out with the resolving power reaching up to 25,000 which is sufficient to separate the leading fine-structure components of the 2s2p 3 P term. Many-body perturbation theory was employed to determine level-to-level cross sections for K -shell excitation with subsequent autoionization. The resonance energies were calculated with inclusion of electron correlation and radiative contributions. Their uncertainties are estimated to be below ±1 meV. Detailed balance confirms the present photoionization cross-section results by comparison with previous dielectronic-recombination measurements. The high accuracy of the theoretical transition energies together with the present experimental results qualify photoabsorption resonances in heliumlike ions as new, greatly improved energy-reference standards at synchrotron radiation facilities.

show abstract

Atomic data for doubly-excited states 2lnl′ of He-like ions and 1s2l

Cited by 31 publications

References 13 publications

Effects of electron correlation and the Breit interaction on one- and two-electron one-photon transitions in double K hole states of He-like ions (10 ≤ Z ≤ 47)*

Effects of electron correlation and the Breit interaction on one- and two-electron one-photon transitions in double K hole states of He-like ions (10 ≤ Z ≤ 47)*

Radiative Cascade Repopulation of 1s2s2p 4P States Formed by Single Electron Capture in 2–18 MeV Collisions of C4+ (1s2s 3S) with He

Photoionization of metastable heliumlike C4+(1s2sS13
Müller
¹
,
Lindroth
²
,
Bari³
et al. 2018
Phys. Rev. A
41
0
42
0
View full text Add to dashboard Cite

Contact Info

Product

Resources

About

Atomic data for doubly-excited states 2lnl′ of He-like ions and 1s2l

Cited by 31 publications

References 13 publications

Effects of electron correlation and the Breit interaction on one- and two-electron one-photon transitions in double K hole states of He-like ions (10 ≤ Z ≤ 47)*

Effects of electron correlation and the Breit interaction on one- and two-electron one-photon transitions in double K hole states of He-like ions (10 ≤ Z ≤ 47)*

Radiative Cascade Repopulation of 1s2s2p 4P States Formed by Single Electron Capture in 2–18 MeV Collisions of C4+ (1s2s 3S) with He

Photoionization of metastable heliumlike C4+(1s2sS13Müller1, Lindroth2, Bari3 et al. 2018Phys. Rev. A410420View full textAdd to dashboardCite

Contact Info

Product

Resources

About

Photoionization of metastable heliumlike C4+(1s2sS13
Müller
¹
,
Lindroth
²
,
Bari³
et al. 2018
Phys. Rev. A
41
0
42
0
View full text Add to dashboard Cite