A beam-foil study of Ni XIX and Cu XX and a theoretical survey of 2p<sup>5</sup>3l configurations from Ar IX to Cu XX

Buchet, J. P.; Buchet‐Poulizac, M. C.; Denis, A.; Désesquelles, J.; Druetta, M.; Martin, S.; Wyart, J.-F.

doi:10.1088/0022-3700/20/8/009

Cited by 50 publications

(29 citation statements)

References 32 publications

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“…Many emission lines of nickel, including those from Ni XIX, have been observed in the sun -see, for example, Jupen (1984) and Feldman et al (2000). Similarly many transitions, particularly within the n = 3 configurations, have been measured in laboratory plasmas by Feldman et al (1967), Swartz et al (1971), Boiko et al (1977), Buchet et al (1987) and Biémont et al (2000). Therefore, atomic data (energy levels, radiative rates, collision strengths and excitation rates) for Ni XIX (and many other ions) are required for the modelling of plasmas, as well as diagnostics for their physical parameters, such as temperature and density.…”

Section: Introductionmentioning

confidence: 89%

Energy levels and radiative rates for transitions in Ni XIX

Aggarwal¹,

Keenan²

2006

A&A

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Aims. In this paper we report calculations for energy levels and radiative rates for transitions in Ni XIX. Methods. The General purpose Relativistic Atomic Structure Package (grasp) has been adopted for the calculation of energy levels and radiative rates. Results. Energies for the lowest 89 levels from the (1s 2 ) 2s 2 2p 6 , 2s 2 2p 5 3 , 2s2p 6 3 , 2s 2 2p 5 4 and 2s2p 6 4 configurations of Ni XIX, are reported. Additionally, radiative rates, oscillator strengths, and line strengths are reported for all electric dipole (E1), magnetic dipole (M1), electric quadrupole (E2), and magnetic quadrupole (M2) transitions among these levels. Comparisons are made with the available results in the literature, and the accuracy of the present data is assessed. Finally, lifetimes for all excited levels are listed, and comparisons made with earlier available theoretical results.

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Section: Introductionmentioning

confidence: 89%

Energy levels and radiative rates for transitions in Ni XIX

Aggarwal¹,

Keenan²

2006

A&A

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“…After Fe, nickel is the most abundant element and many emission lines of its ions, including those from Ni xix, have been observed in the Sun -see, for example, Jupen (1984) and Feldman et al (2000). Similarly many transitions, particularly within the n = 3 configurations, have been measured in laboratory plasmas by Feldman et al (1967), Swartz et al (1971), Boiko et al (1977), Buchet et al (1987), Biémont et al (2000), and more recently by Gu et al (2004Gu et al ( , 2007. Therefore, to fulfill the requirement of atomic data, we have also reported calculations for Ni xi-xvii (Aggarwal et al 2003(Aggarwal et al , 2007andKeenan 2007c, 2008), and in this paper we focus our attention on Ne-like Ni xix.…”

Section: Introductionmentioning

confidence: 99%

Effective collision strengths for transitions in Ni XIX

Aggarwal¹,

Keenan²

2008

A&A

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Aims. In this paper we report electron impact collision strengths and excitation rates for transitions among the lowest 89 levels of Ni xix.Methods. The Dirac atomic R-matrix code (darc) is adopted for the calculations of collision strengths and subsequently the effective collision strengths. Results. Collision strengths for resonance transitions among 89 levels arising from the (1s 2 ) 2s 2 2p 6 , 2s 2 2p 5 3 , 2s2p 6 3 , 2s 2 2p 5 4 , and 2s2p 6 4 configurations of Ni xix are reported over a wide energy range below 250 Ryd. Additionally, effective collision strengths for all 3916 transitions among the 89 levels are listed over a wide temperature range below 10 7 K. Comparisons are made among different calculations and the accuracy of the data is assessed. Finally, comparisons between theoretical and experimental intensity ratios of some prominent lines of Ni xix are discussed.

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“…2. The experimental data of other members of the neonlike sequence were found for CaXIMnXVI in [10,11], for FeXVII in [12], for NiXIX and CuXX in [13] and for KrXXVII in [14].…”

Section: Resultsmentioning

confidence: 99%

“…In the beam foil experiment, on the other hand, 3-3 transitions of some neonlike ions have also been investigated. The 2s 2 2p 5 3 g configurations were studied by Buchet et al in FeXVII [12], NiXIX and CuXX [13] and KrXXVII [ 14]. The experimental levels of neonlike ions are known up to KrXXVII.…”

Section: Introductionmentioning

confidence: 99%

Classification of 3-3 transitions in neonlike germanium in laser-produced plasma

Yuan

Kato

Daido

et al. 1994

Z Phys D - Atoms, Molecules and Clusters

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Abstract. Classification of 3-3 transitions in neonlike germanium in laser-produced plasma has been made. The spectra have been observed in the range of 185-290 using a high resolving power (2/A2 ~ 13000) grazing-incidence spectrometer in XUV laser experiment. A total of 21 lines (including five lasing lines) have been classified as transitions between the 2s 2 2p 5 3s, 3p, 3d or 2s 2p 6 3p, 3 d and sodiumlike germanium configurations. The identified transitions have been used to derive energy levels of 2s 2 2p531 in neonlike germanium. The experimental resuits have been compared with theoretical predictions from Dirac-Fock (MCDF) calculations.

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A beam-foil study of Ni XIX and Cu XX and a theoretical survey of 2p⁵3l configurations from Ar IX to Cu XX

Cited by 50 publications

References 32 publications

Energy levels and radiative rates for transitions in Ni XIX

Energy levels and radiative rates for transitions in Ni XIX

Effective collision strengths for transitions in Ni XIX

Classification of 3-3 transitions in neonlike germanium in laser-produced plasma

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A beam-foil study of Ni XIX and Cu XX and a theoretical survey of 2p53l configurations from Ar IX to Cu XX

Cited by 50 publications

References 32 publications

Energy levels and radiative rates for transitions in Ni XIX

Energy levels and radiative rates for transitions in Ni XIX

Effective collision strengths for transitions in Ni XIX

Classification of 3-3 transitions in neonlike germanium in laser-produced plasma

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Product

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A beam-foil study of Ni XIX and Cu XX and a theoretical survey of 2p⁵3l configurations from Ar IX to Cu XX