Extreme ultraviolet spectra of highly charged Xe ions

Träbert, E.; Beiersdörfer, P.; Lepson, J. K.; Chen, H.

doi:10.1103/physreva.68.042501

Cited by 45 publications

(60 citation statements)

References 59 publications

(3 reference statements)

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“…We have contributed only one datum so far to this plot, namely for xenon. This point was measured on SuperEBIT [52]. The point deviates strongly from the isoelectronic trend set by earlier measurements and theory.…”

Section: Isoelectronic Trends Of Complex Ionsmentioning

confidence: 93%

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Highly Charged Ion Research at the Livermore Electron Beam Ion Traps

Beiersdörfer

2005

Phys. Scr.

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Spectroscopy performed with the three Livermore electron beam ion traps is reviewed, which is continuing and complementing the innumerable contributions to atomic physics provided over the years by heavy-ion accelerators. Numerous spectrometers were developed that cover the spectral bands from the visible to the hard x ray region. These enabled exhaustive line surveys useful for x-ray astrophysics and for systematic studies along iso-electronic sequences, such as the 4s-4p, 3s-3p, and 2s-2p transitions in ions of the Cu-I, Na-I, and Li-I sequences useful for studying QED and correlation effects as well as for precise determinations of atomic-nuclear interactions. They also enabled measurements of radiative transition probabilities of very long-lived (milli-and microseconds) and very short-live (femtosecond) levels. Because line excitation processes can be controlled by choice of the electron beam energy, the observed line intensities are used to infer cross sections for electron-impact excitation, dielectronic recombination, resonance excitation, and innershell ionization. These capabilities have recently been expanded to simulate x-ray emission from comets by charge exchange. Specific contributions to basic atomic physics, nuclear physics, and high-temperature diagnostics are illustrated.

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Section: Isoelectronic Trends Of Complex Ionsmentioning

confidence: 93%

“…These measurements involve the 2s 1/2 -2p 3/2 transitions. Measurements of the 2s 1/2 -2p 1/2 transitions are now under way on SuperEBIT [52] that should further improve the achieved accuracy of the 2s QED determinations.…”

Section: Tests Of Strong-field Qedmentioning

confidence: 99%

Highly Charged Ion Research at the Livermore Electron Beam Ion Traps

Beiersdörfer

2005

Phys. Scr.

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“…Since then, additional studies on energy structures, transition probabilities and other atomic properties of B-like ions have been made in order to supply more accurate data [17][18][19][20][21][22] and to explore electron correlation effects [22][23][24][25] and quantum electrodynamical (QED) effects [26][27][28]. Meanwhile, some experiments with high precision have been carried out, for example, using electron-beam ion trap (EBIT) devices at Lawrence Livermore National Laboratory [29][30][31] and at the Max-Plank-Institut für Kernphysik [32,33] and heavy-ion storage ring measurements at TSR in Heidelberg [34]. These measurements provided benchmarks for theoretical approaches.…”

Section: Introductionmentioning

confidence: 99%

Two-electron–one-photon M1 and E2 transitions between the states of the 2p³and 2s²2p odd configurations for B-like ions with 18 ≤Z≤ 92

Li¹,

Jönsson²,

Dong³

et al. 2010

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

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Two-electron-one-photon (TEOP) M1 and E2 transition energies, line strengths and transition probabilities between the states of the 2p 3 and 2s 2 2p odd configurations for B-like ions with 18 Z 92 have been calculated using the GRASP2K package based on the multiconfiguration Dirac-Hartree-Fock (MCDHF) method. Employing active-space techniques to expand the configuration list, we have systematically considered the valence, core-valence and core-core electron correlation effects. Breit interaction and quantum electrodynamical (QED) effects were also included to correct atomic state wavefunctions and the corresponding energies. Influences of electron correlation, Breit interaction and QED effects on transition energies and line strengths of the TEOP M1 and E2 transitions were analysed in detail. The present results were also compared with other theoretical and experimental values.

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“…Other EBIT work has addressed (without time resolution) high-Z B-like ions, that is ions in the realm of large relativistic effects and notable contributions from QED [47][48][49]. Because of the large fine structure intervals in highly charged high-Z ions, those measurements just mentioned comprise just one or a few lines of any B-like ion.…”

Section: Earlier Workmentioning

confidence: 99%

MCDHF Calculations and Beam-Foil EUV Spectra of Boron-Like Sodium Ions (Na VII)

Jönsson

Ekman

Trabert

2015

Atoms

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Atomic data, such as wavelengths and line identifications, are necessary for many applications, especially in plasma diagnostics and for interpreting the spectra of distant astrophysical objects. The number of valence shell electrons increases the complexity of the computational problem. We have selected a five-electron ion, Na 6+(with the boron-like spectrum Na VII), for looking into the interplay of measurement and calculation. We summarize the available experimental work, perform our own extensive relativistic configuration interaction (RCI) computations based on multi-configuration Dirac-Hartree-Fock (MCDHF) wave functions, and compare the results to what is known of the level structure. We then discuss problems with databases that have begun to combine observations and computations.

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Extreme ultraviolet spectra of highly charged Xe ions

Cited by 45 publications

References 59 publications

Highly Charged Ion Research at the Livermore Electron Beam Ion Traps

Highly Charged Ion Research at the Livermore Electron Beam Ion Traps

Two-electron–one-photon M1 and E2 transitions between the states of the 2p³and 2s²2p odd configurations for B-like ions with 18 ≤Z≤ 92

MCDHF Calculations and Beam-Foil EUV Spectra of Boron-Like Sodium Ions (Na VII)

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Extreme ultraviolet spectra of highly charged Xe ions

Cited by 45 publications

References 59 publications

Highly Charged Ion Research at the Livermore Electron Beam Ion Traps

Highly Charged Ion Research at the Livermore Electron Beam Ion Traps

Two-electron–one-photon M1 and E2 transitions between the states of the 2p3and 2s22p odd configurations for B-like ions with 18 ≤Z≤ 92

MCDHF Calculations and Beam-Foil EUV Spectra of Boron-Like Sodium Ions (Na VII)

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Two-electron–one-photon M1 and E2 transitions between the states of the 2p³and 2s²2p odd configurations for B-like ions with 18 ≤Z≤ 92