The X-ray spectra of H-like, He-like and Li-like silicon ions after foil excitation

Trabert, E; Armour, I A; Bashkin, S.; Jelley, N. A.; O'Brien, R. R.; Silver, J. D.

doi:10.1088/0022-3700/12/10/013

Cited by 35 publications

(13 citation statements)

References 42 publications

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“…Similarly good agreements (2.5 mÅ) are also found when comparing our theoretical wavelengths with the experimental results reported by Trabert et al (1979). When compared with the experimental wavelengths from Mosnier et al (1986), however, relatively large discrepancies are found.…”

Section: Energy Levels and Wavelengthssupporting

confidence: 89%

“…λ c : laser plasma experimental results from Faenov et al (1994). λ d : beam foil experimental results from Trabert et al (1979). λ e : beam foil experimental results from Mosnier et al (1986).…”

Section: Energy Levels and Wavelengthsmentioning

confidence: 99%

“…Using the beam-foil method, Trabert et al (1979Trabert et al ( , 1982 reported the X-ray spectra of foil-excited fast Complete Tables 1, 3, and 4 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/viz-bin/qcat?J/A+A/522/A103 H-like to Be-like silicon ions. These emission lines originate mainly from 2p-1s transitions.…”

Section: Introductionmentioning

confidence: 99%

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K-shell energy levels and radiative rates for transitions in Si xi

Wei

Shi

Zhao

et al. 2010

A&A

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Context. Atomic data for K-shell transitions are essential for modeling the K absorption lines, which have been observed in the spectra of active galaxies by high-resolution X-ray observatories, e.g. XMM, Chandra, and Suzaku. These accurate atomic data are also needed for line identifications and spectroscopic diagnostic of plasmas in laboratory generated by laser or beam-foil method. Aims. We calculate atomic data using the atomic code flexible atomic code (FAC) taking relativistic effects and configuration interactions into account. Methods. We calculate the K-shell transitions among the configurations of 1s 2 2s 2 , 1s 2 2s2p, 1s 2 2p 2 , 1s 2 2sn l , 1s 2 2pn l , 1s2s 2 2p, 1s2s2p 2 , 1s2p 3 , 1s2s2pn l , and 1s2p 2 n l , n ≤ 4, l ≤ n for beryllium-like Si xi. We present the K-shell energy levels, wavelengths, radiative rates, and oscillator strengths for Si xi. To assess the accuracy of current data, we compare our results with both former experiments and other theoretical works.Results. The present K-shell level energies and wavelengths are accurate to within 2 eV and 10 mÅ, respectively. The radiative rates have an accuracy of around 20% for the majority of our transitions.

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Section: Energy Levels and Wavelengthssupporting

confidence: 89%

Section: Energy Levels and Wavelengthsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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K-shell energy levels and radiative rates for transitions in Si xi

Wei

Shi

Zhao

et al. 2010

A&A

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“…As stated in the introduction, no isolated lines of Si ix were observed using beam-foil methods (Trabert et al 1979(Trabert et al , 1982Mosnier et al 1986). The main reasons are that it is difficult to generate these K-vacancy states since the needed energies are usually higher than the ion ionization energy, and the high auto-ionization rates of these K-vacancy states depress the production of fluorescence yielding, thus these K-lines from Si ix are relatively very weak.…”

Section: Energy Levels and Wavelengthsmentioning

confidence: 89%

“…Trabert et al (1979Trabert et al ( , 1982 measured and identified X-ray emission lines from H-like to N-like silicon ions in the beam-foil experiments. These lines mainly belong to K-shell 2p−1s transitions, while lines from C-like and N-like ions are too weak to be clearly identified.…”

Section: Introductionmentioning

confidence: 99%

K-shell energy levels and radiative rates for transitions in Si ix

Wei

Shi

Wang

et al. 2014

A&A

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Context. Accurate atomic data are needed to analyze the Si ix K-shell features in astrophysical X-ray spectra. Relative large discrepancies in the existing atomic data have impeded this progress.Aims. We present the accurate Si ix K-shell transition data, including K-shell energy levels, wavelengths, radiative rates, and oscillator strengths. Methods. The flexible atomic code (FAC), which is a fully relativistic atomic code with configuration interaction (CI) included, was employed to calculate these data. To investigate the CI effects, calculations with different configurations included were carried out.Results. The K-shell atomic data of Si ix transitions between 1s 2 2s 2 2p 2 , 1s 2 2s2p 3 , 1s 2 2p 4 , 1s2s 2 2p 3 , 1s2s2p 4 , and 1s2p 5 are reported.The accuracy of our data is demonstrated by comparing them with the available experimental measurements and theoretical calculations. The energy levels are accurate to 3.5 eV, the wavelengths to within 15 mÅ. For most transitions, the radiative rates an accuracy of 20%. The effects of CI from high-energy configurations were investigated as well.

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Experimental Investigations of the Structure of Highly Ionized Atoms

Martinson

1983

Atomic Physics of Highly Ionized Atoms

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The X-ray spectra of H-like, He-like and Li-like silicon ions after foil excitation

Cited by 35 publications

References 42 publications

K-shell energy levels and radiative rates for transitions in Si xi

K-shell energy levels and radiative rates for transitions in Si xi

K-shell energy levels and radiative rates for transitions in Si ix

Experimental Investigations of the Structure of Highly Ionized Atoms

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