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

Li, Ji‐Guang; Jönsson, P.; Dong, Chenzhong; Gaigalas, Gediminas

doi:10.1088/0953-4075/43/3/035005

Cited by 20 publications

(13 citation statements)

References 38 publications

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“…For most of the transitions, dT is well below 10%, and for the strongest ones dT is well below 3%. The weak transitions are either intercombination transitions, where in relativistic calculations the low rates result from strong cancellation of several large contributions to the transition moment (Ynnerman & Fischer 1995), or two-electron one-photon (TEOP) transitions, where the rate is identically zero in the simplest approximation of the wave function and where the transition results from inclusion of correlation effects (Li et al 2010). These types of transitions are still extremely challenging for theory and improved methodology is needed to further decrease the uncertainties.…”

Section: S IImentioning

confidence: 99%

Theoretical investigation of energy levels and transition data for S II, Cl III, Ar IV

Rynkun

Gaigalas

Jönsson

2019

A&A

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Aims. The aim of this work is to present accurate and extensive results of energy spectra and transition data for the S II, Cl III, and Ar IV ions. These data are useful for understanding and probing physical processes and conditions in various types of astrophysical plasmas. Methods. The multiconfiguration Dirac–Hartree–Fock (MCDHF) and relativistic configuration interaction (RCI) methods, which are implemented in the general-purpose relativistic atomic structure package GRASP2K, are used in the present work. In the RCI calculations the transverse-photon (Breit) interaction, the vacuum polarization, and the self-energy corrections are included. Results. Energy spectra are presented comprising the 134, 87, and 103 lowest states in S II, Cl III, and Ar IV, respectively. Energy levels are in very good agreement with NIST database recommended values and associated with smaller uncertainties than energies from other theoretical computations. Electric dipole (E1), magnetic dipole (M1), and electric quadrupole (E2) transition data are computed between the above states together with the corresponding lifetimes. Based on internal validation, transition rates for the majority of the stronger transitions are estimated to have uncertainties of less than 3%.

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Section: S IImentioning

confidence: 99%

Theoretical investigation of energy levels and transition data for S II, Cl III, Ar IV

Rynkun

Gaigalas

Jönsson

2019

A&A

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“…Li et al [35] calculated the radiative rates of two-electronone-photon M1 and E2 transitions between the states of the 2p 3 and 2s 2 2p configurations of B-like ions (Z = 18-92), including W 69+ , using the MCDF method. Their results may be useful in collisional-radiative modeling of hot plasmas.…”

Section: Calculations Of Hyperfine-induced Forbidden Transitionsmentioning

confidence: 99%

Recent progress in spectroscopy of tungsten¹This review is part of a Special Issue on the 10th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas.

Kramida

2011

Can. J. Phys.

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This contribution reviews experimental and theoretical work on spectroscopy of tungsten published since the last critical compilation of the energy levels and spectral lines of highly ionized tungsten (Kramida and Shirai. At. Data Nucl. Data Tables, 95, 305 (2009)). Since then, 18 new experimental studies were published, which resulted in new identifications and (or) significantly improved wavelengths of spectral lines and energy levels of Li-like through As-like and Pm-like tungsten. A few tens of theoretical studies of tungsten spectra were published since 2008. A number of them report on high-precision calculations of energy levels, transition wavelengths, and radiative rates for tungsten spectra, such as neutral tungsten, Yb-like, Rh-like through Rb-like, Ag-like, Ga-like, Zn-like, Ni-like, Ca-like, Al-like, Mg-like, Na-like, Ne-like, B-like, Be-like, and Li-like. These developments are reviewed. Based on new experimental data, systematic errors are removed from some of the earlier measurements. Some new data are obtained by analyzing publications of other authors. Based on new published theoretical data, some old experimental results were confirmed and assessed. Revised and extended tables of energy levels and spectral lines of highly ionized tungsten are presented. PACS Nos: 32.10.Fn, 32.30.-r, 32.30.Jc, 32.30.Rj Résumé : Nous passons ici en revue les travaux expérimentaux et théoriques sur la spectroscopie du tungstène, qui ont été publiés depuis la dernière compilation systématique des niveaux d'énergie et des raies spectrales du tungstène hautement ionisé (Kamida et Shirai. At. Data Nucl. Data Tables, 95, 305 (2009)). Depuis, 18 nouvelles études expérimentales ont été publiées, qui ont résulté en de nouvelles identifications et une amélioration significative des longueurs d'onde des raies et de l'énergie des niveaux des ions de tungstène allant du type Li jusqu'aux types As et Pm. Quelques dizaines études théoriques sur le tungstène ont été publiées depuis 2008. Certaines d'entre elles rapportent des calculs de haute précision de niveaux d'énergie, de longueurs d'onde de transitions et de taux radiatifs pour des spectres de tungstène, neutre et ionisé de types Yb, de Rh à Rb, Ag, Ga, Zn, Ni, Ca, Al, Mg, Na, Ne, B, Be et Li. Nous les passons en revue. Les mesures récentes ont permis d'éliminer certaines erreurs systématiques des mesures antérieures. Certains nouveaux résultats viennent de l'analyse de publications d'autres auteurs. Les nouveaux résultats théoriques ont permis de confirmer des résultats expérimentaux antérieurs dont l'identification restait incertaine. Nous présentons des tables nouvelles et étendues des niveaux d'énergie et des raies spectrales du tungstène hautement ionisé. [Traduit par la Rédaction]

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“…G. Corrégé and A. Hibbert have presented energy levels, oscillator strengths and transitions probabilities for C II, N III and O IV using the code CIV3 [12]. Jönsson et al presented energy levels, specific mass shift parameters, hyperfine interaction constants, and transition probabilities for C II, N III, and O IV using the multiconfiguration Dirac-Hartree-Fock method [13,14]. L. Hao and G. Jiang calculated energy levels, transition rates, and line strengths for several ions along the B I isoelectronic sequence also using the multiconfiguration Dirac-Hartree-Fock method [15].…”

Section: Introductionmentioning

confidence: 99%

Energies and E1, M1, E2, M2 transition rates for states of the 2s22p, 2s2p2, and 2p3 configurations in boron-like ions between N III and Zn XXVI

Rynkun

Jönsson

Gaigalas

et al. 2012

Atomic Data and Nuclear Data Tables

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Energies, E1, M1, E2, M2 transition rates, line strengths, oscillator strengths, and lifetimes from relativistic configuration interaction calculations are reported for the states of the (1s 2 )2s 2 2p, 2s2p 2 , and 2p 3 configurations in all boron-like ions between N III and Zn XXVI. Valence, core-valence, and core-core correlation effects were accounted for through singledouble multireference (SD-MR) expansions to increasing sets of active orbitals.

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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

Cited by 20 publications

References 38 publications

Theoretical investigation of energy levels and transition data for S II, Cl III, Ar IV

Theoretical investigation of energy levels and transition data for S II, Cl III, Ar IV

Recent progress in spectroscopy of tungsten¹This review is part of a Special Issue on the 10th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas.

Energies and E1, M1, E2, M2 transition rates for states of the 2s22p, 2s2p2, and 2p3 configurations in boron-like ions between N III and Zn XXVI

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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

Cited by 20 publications

References 38 publications

Theoretical investigation of energy levels and transition data for S II, Cl III, Ar IV

Theoretical investigation of energy levels and transition data for S II, Cl III, Ar IV

Recent progress in spectroscopy of tungsten1This review is part of a Special Issue on the 10th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas.

Energies and E1, M1, E2, M2 transition rates for states of the 2s22p, 2s2p2, and 2p3 configurations in boron-like ions between N III and Zn XXVI

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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

Recent progress in spectroscopy of tungsten¹This review is part of a Special Issue on the 10th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas.