Revised and extended analysis of trebly ionized bromine: Br IV

Tauheed, A.; Joshi, Y N; Jabeen, S.

doi:10.1088/0031-8949/78/06/065305

Cited by 8 publications

(7 citation statements)

References 15 publications

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“…The doubly ionized selenium atom has ground configuration 4s 2 4p 2 and the excited configurations are 4s4p 3 , 4s 2 4pnd (n 4) and 4s 2 4pns (n 5). Recently, we revised and extended the analysis of Br IV [1], which is the neighbouring isoelectronic member of Se III. It was noticed that most of the earlier reported works were not supported by any reliable theoretical calculations and have been found erroneous and are therefore revised.…”

Section: Introductionmentioning

confidence: 99%

Revised and extended analysis of doubly ionized selenium: Se III

Tauheed¹,

Hala²

2012

Phys. Scr.

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The spectrum of selenium was recorded on a 3 m normal incidence vacuum spectrograph of the Antigonish laboratory (Canada) in the wavelength region 300–2080 Å using a triggered spark source. The theoretical structure of doubly ionized selenium (Se III) was predicted by Cowan's multi-configuration interaction code. The ground configuration of Se III is 4s24p2 and the excited configurations are of the type 4s24pnd (n⩾4), 4s24pns (n⩾5) and the inner shell excitation gives rise to the 4s4p3 configuration. The 4s24p2−[4s4p3+4s24p (4d+5d+6d+7d+5s+6s+7s+8s)] transition array has been analyzed. Several earlier reported levels have been revised and four new configurations have been added. All the levels of these configurations have been established. More than 180 spectral lines have been identified in this spectrum. A total of 75 energy levels belonging to the above-mentioned configurations have been established. Least-squares fitted parametric and Hartree–Fock calculations were used to interpret the observed spectrum. Excellent agreement with theoretical calculations was noticed. The standard deviation of least-squares fit is only 110 cm−1. The ionization potential of Se III was found to be 255 650±150 cm−1 (31.696±0.018 eV). The accuracy of our wavelengths for sharp lines is better than ±0.005 Å.

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Section: Introductionmentioning

confidence: 99%

Revised and extended analysis of doubly ionized selenium: Se III

Tauheed¹,

Hala²

2012

Phys. Scr.

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“…[1][2][3] Very recently, with the collaboration of Russian and American scientists, the discovery of element Uus was announced by the Joint Institute for Nuclear Research in Dubna, Russia. 4 Two isotopes of this element, 293 Uus and 294 Uus, were produced in the fusion reaction 48 Ca+ 249 Bk followed by the emission of four and three neutrons, respectively. They were identified through the corresponding alpha decay chains.…”

Section: Introductionmentioning

confidence: 99%

Ionization Potentials, Electron Affinities, Resonance Excitation Energies, Oscillator Strengths, And Ionic Radii of Element Uus (Z = 117) and Astatine

Chang

Dong

2010

J. Phys. Chem. A

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Multiconfiguration Dirac-Fock (MCDF) method was employed to calculate the first five ionization potentials, electron affinities, resonance excitation energies, oscillator strengths, and radii for the element Uus and its homologue At. Main valence correlation effects were taken into account. The Breit interaction and QED effects were also estimated. The uncertainties of calculated IPs, EAs, and IR for Uus and At were reduced through an extrapolation procedure. The good consistency with available experimental and other theoretical values demonstrates the validity of the present results. These theoretical data therefore can be used to predict some unknown physicochemical properties of element Uus, Astatine, and their compounds.

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“…The most complete EUV spectrum of a Ge-like spectrum of a multi-charged ion appears to be Br IV [107,108], an analysis of which was published more than four decades ago. Beyond that, there are spectra that cover incidental sections of the EUV spectral range and some transition arrays [60,[109][110][111][112][113][114][115][116], but the coverage is far from complete.…”

Section: Ge-like Ionsmentioning

confidence: 99%

Intercombination Transitions in the n = 4 Shell of Zn-, Ga-, and Ge-Like Ions of Elements Kr through Xe

Santana

Quinet

Palmeri

2018

Atoms

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Earlier beam-foil measurements have targeted 4s-4p intercombination transitions in the Zn-, Ga- and Ge-like ions of Nb (Z=41), Mo (Z=42), Rh (Z=44), Ag (Z=47) and I (Z=53). At the time, the spectra were calibrated with literature data on prominent lines in the Cu- and Zn-like ions. Corresponding literature data on the intercombination transitions in Ga- and Ge-like ions were largely lacking, which caused some ambiguity in the line identifications. We review the (mostly computational) progress made since. We find that a consistent set of state-of-the-art computations of Ga- and Ge-like ions would be highly desirable for revisiting the beam-foil data and the former line identifications for the elements from Kr (Z=36) to Xe (Z=54). We demonstrate that the literature data for these two isoelectronic sequences are insufficient, and we contribute reference computations in the process. We discuss the option of electron beam ion trap measurements as an alternative to the earlier use of classical light sources, beam-foil interaction and laser-produced plasmas, with the example of Xe (Z=54).

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Revised and extended analysis of trebly ionized bromine: Br IV

Cited by 8 publications

References 15 publications

Revised and extended analysis of doubly ionized selenium: Se III

Revised and extended analysis of doubly ionized selenium: Se III

Ionization Potentials, Electron Affinities, Resonance Excitation Energies, Oscillator Strengths, And Ionic Radii of Element Uus (Z = 117) and Astatine

Intercombination Transitions in the n = 4 Shell of Zn-, Ga-, and Ge-Like Ions of Elements Kr through Xe

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