Relativistic multireference Møller–Plesset perturbation theory calculations of the energy levels and transition probabilities in Ne-like xenon, tungsten, and uranium ions

Vilkas, Marius J.; López-Encarnación, Juan M.; Ishikawa, Yasuyuki

doi:10.1016/j.adt.2007.09.001

Cited by 18 publications

(36 citation statements)

References 12 publications

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“…Unfortunately, these comparisons are not sufficient for accuracy determination, particularly when the NIST energies are not based on direct measurements. Finally, as for most W ions, for W LXV also there is a strong mixing for some levels and therefore the level designations listed in Table 7 can vary, although the MRMP calculations [27] have the same labels as in our work. Nevertheless, in Table M we list the eigenvectors for the lowest 33 levels, which include all of the NIST compilation.…”

Section: Ne-like W LXVmentioning

confidence: 96%

“…Similarly, there is no difference in level orderings with the MRMP calculations [27] and the energies differ only by less than 0.6 Ryd (0.06%) with GRASP -see levels 63 and 77-83. Therefore, overall there is no (significant) discrepancy between the three independent calculations.…”

Section: Ne-like W LXVmentioning

confidence: 99%

“…Al-like W LXII [23], Mg-like W LXIII [23] and Na-like W LXIV [27]. Therefore, we confine our comparisons to these three ions.…”

Section: F-like W LXVImentioning

confidence: 99%

“…However, Vilkas et al [27] have reported energies for 141 levels of the 2p 6 , (2s2p 6 )3ℓ, 4ℓ, 5ℓ (except 5g), and (2p 5 ) 3ℓ, 4ℓ, 5ℓ (except 5g) configurations.…”

Section: Ne-like W LXVmentioning

confidence: 99%

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Radiative rates for E1, E2, M1, and M2 transitions in S-like to F-like tungsten ions (W LIX to W LXVI)

Aggarwal

Keenan

2016

Atomic Data and Nuclear Data Tables

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Calculations of energy levels, radiative rates and lifetimes are reported for eight ions of tungsten, i.e. S-like (W LIX) to F-like (W LXVI). A large number of levels has been considered for each ion and extensive configuration interaction has been included among a range of configurations. For the calculations, the general-purpose relativistic atomic structure package (GRASP) has been adopted, and radiative rates (as well as oscillator strengths and line strengths) are listed for all E1, E2, M1, and M2 transitions of the ions. Comparisons have been made with earlier available experimental and theoretical energies, although these are limited to only a few levels for most ions. Therefore for additional accuracy assessments, particularly for energy levels, analogous calculations have been performed with the flexible atomic code (FAC).

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Section: Ne-like W LXVmentioning

confidence: 96%

Section: Ne-like W LXVmentioning

confidence: 99%

“…Al-like W LXII [23], Mg-like W LXIII [23] and Na-like W LXIV [27]. Therefore, we confine our comparisons to these three ions.…”

Section: F-like W LXVImentioning

confidence: 99%

“…However, Vilkas et al [27] have reported energies for 141 levels of the 2p 6 , (2s2p 6 )3ℓ, 4ℓ, 5ℓ (except 5g), and (2p 5 ) 3ℓ, 4ℓ, 5ℓ (except 5g) configurations.…”

Section: Ne-like W LXVmentioning

confidence: 99%

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Radiative rates for E1, E2, M1, and M2 transitions in S-like to F-like tungsten ions (W LIX to W LXVI)

Aggarwal

Keenan

2016

Atomic Data and Nuclear Data Tables

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“…For this purpose we used GRASP2k code [33] and calculated excitation energies and dipole oscillator strengths associated with the transitions listed in Table 2. These values were compared with the measurements on excitation energies reported by Beiersdorfer et al [21] as well as available theoretical results [21,[35][36][37][38][39][40]42]. In particular, we found that Atoms 2015, 3 59 the maximum deviation of excitation energy was 0.029% for Mg-like, 0.056% for Na-like, 0.079% for Ne-like and F-like and 0.049% for O-like tungsten ions with the measured and the other available theoretical values.…”

Section: L-shell Excitation Of Mg-through O-like Tungsten Ionsmentioning

confidence: 72%

Fully Relativistic Electron Impact Excitation Cross-Section and Polarization for Tungsten Ions

Priti

Dipti

Sharma

et al. 2015

Atoms

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Electron impact excitation of highly charged tungsten ions in the framework of a fully relativistic distorted wave approach is considered in this paper. Calculations of electron impact excitation cross-sections for the M-and L-shell transitions in the tungsten ions W n+ (n = 44-66) and polarization of the decay of photons from the excited tungsten ions are briefly reviewed and discussed. New calculations in the wide range of incident electron energies are presented for M-shell transitions in the K-like through Ne-like tungsten ions.

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Measurements of L‐shell X‐ray emission lines of neonlike europium on an electron beam ion trap

et al. 2019

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We report a measurement of the two x-ray transitions that proceed from the (1s 2 2s 2 2p 5 1/2 3d 3/2 ) J=1 and (1s 2 2s 1/2 2p 6 3p 1/2 ) J=1 upper levels to the (1s 2 2s 2 2p 6 ) J=0 ground level in neonlike Eu 53+ (Z = 63), i.e. near the previously documented avoided crossing of the two upper levels at Z = 68. The measurement was carried out using the calorimeter spectrometer on the Livermore EBIT-I electron beam ion trap. It affirms the trends set by the neighboring neonlike ions both in terms of the relative intensity of the two lines and in terms of the magnitude of disagreement with theoretical energy level predictions.

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Relativistic multireference Møller–Plesset perturbation theory calculations of the energy levels and transition probabilities in Ne-like xenon, tungsten, and uranium ions

Cited by 18 publications

References 12 publications

Radiative rates for E1, E2, M1, and M2 transitions in S-like to F-like tungsten ions (W LIX to W LXVI)

Radiative rates for E1, E2, M1, and M2 transitions in S-like to F-like tungsten ions (W LIX to W LXVI)

Fully Relativistic Electron Impact Excitation Cross-Section and Polarization for Tungsten Ions

Measurements of L‐shell X‐ray emission lines of neonlike europium on an electron beam ion trap

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