Multiconfiguration Dirac-Fock calculations of transition energies with QED corrections in three-electron ions

Indelicato, P.; Desclaux, J. P.

doi:10.1103/physreva.42.5139

Cited by 232 publications

(183 citation statements)

References 38 publications

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“…For the other shells, when no one-electron value is known, we simply use the value of F nl j (Zα) for highest known Z, as this function is very slowly varying. For the screening we use the Welton approximation [62,63]. This approximation, which involves evaluating the hydrogenic wavefunction of the screened electron for finite nucleus, fails for the 1s shell and Z ≥ 169, since one-electron energy becomes smaller than −2m e c 2 .…”

Section: Qed Correctionsmentioning

confidence: 99%

Are MCDF calculations 101% correct in the super-heavy elements range?

2011

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We explore QED and many-body effects in superheavy elements up to Z = 173 using the multiconfiguration Dirac-Fock method. We study the effect of going beyond the average-level approximation on the determination of the ground state of element 140, and compare with the recent work of Pekka Pyykkö on the periodic table for super heavy elements [1]. We confirm that QED corrections are of the order of 1% on ionization energies. We show that the atomic number at which the 1s shell dives into the negative energy continuum is 173, and is not affected by the approximation employed to evaluate the electron-electron interaction.

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Section: Qed Correctionsmentioning

confidence: 99%

Are MCDF calculations 101% correct in the super-heavy elements range?

2011

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“…Selfenergy screening and vacuum polarization are treated with the approximate method developed by Indelicato and coworkers [23,24,25,26]. These methods yield results in close agreement with more sophisticated methods based on QED [27,28,29].…”

Section: Radiative Correctionsmentioning

confidence: 55%

Relativistic correlation correction to the binding energies of the ground configuration of beryllium-like, neon-like, magnesium-like and argon-like ions

et al. 2006

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Abstract. Total electronic correlation correction to the binding energies of the isoelectronic series of Beryllium, Neon, Magnesium and Argon, are calculated in the framework of relativistic multiconfiguration DiracFock method. Convergence of the correlation energies is studied as the active set of orbitals is increased. The Breit interaction is treated fully self-consistently. The final results can be used in the accurately determination of atomic masses from highly charged ions data obtained in Penning-trap experiments.PACS. 31.30.Jv -31.25.Eb

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“…The theoretical values are from Refs. [87], [88], [89], and [90] and are labeled by the year of publication. [91] (solid line).…”

Section: Resultsmentioning

confidence: 99%

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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Multiconfiguration Dirac-Fock calculations of transition energies with QED corrections in three-electron ions

Cited by 232 publications

References 38 publications

Are MCDF calculations 101% correct in the super-heavy elements range?

Are MCDF calculations 101% correct in the super-heavy elements range?

Relativistic correlation correction to the binding energies of the ground configuration of beryllium-like, neon-like, magnesium-like and argon-like ions

Highly Charged Ion Research at the Livermore Electron Beam Ion Traps

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