The 1s-3p Kβ-like x-ray spectrum of highly ionized iron

Klapisch, M.; Schwob, J. L.; Fraenkel, B. S.; Oreg, J.

doi:10.1364/josa.67.000148

Cited by 360 publications

(131 citation statements)

References 20 publications

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“…HULLAC calculates atomic wave functions, level energies, radiative transition rates , and oscillator strengths according A f ji ij to the fully relativistic, multiconfiguration, parametric potential method (Klapisch 1971;Klapisch et al 1977). Electron impact excitation rate coefficients are computed quasi-relativistically in the distorted wave approximation (Bar-Shalom, Klapisch, & Oreg 1988) assuming a Maxwellian velocity distribution.…”

Section: ϫ3mentioning

confidence: 99%

The Fe xxii I (11.92 )/ I (11.77 ) Density Diagnostic Applied to the Chandra High Energy Transmission Grating Spectrum of EX Hydrae

Mauche

Liedahl

Fournier

2003

ApJ

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Using the Livermore X-ray Spectral Synthesizer, which calculates spectral models of highly charged ions based primarily on HULLAC atomic data, we investigate the temperature, density, and photoexcitation dependence of the line ratio of Fe xxii. We find that this line ratio has a critical density cmc is approximately 0.3 at low densities and 1.5 at high densities, and is very insensitive to temperature and photoexcitation; therefore, it is a useful density diagnostic for sources like magnetic cataclysmic variables, in which the plasma densities are high and in which the efficacy of the He-like ion density diagnostic is compromised by the presence of a bright ultraviolet continuum. Applying this diagnostic to the Chandra High Energy Transmission Grating spectrum of the intermediate polar EX Hya, we find that the electron density of its MK plasma is, which is orders of magnitude greater than that typically observed in the Sun or other late-type stars.

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Section: ϫ3mentioning

confidence: 99%

The Fe xxii I (11.92 )/ I (11.77 ) Density Diagnostic Applied to the Chandra High Energy Transmission Grating Spectrum of EX Hydrae

Mauche

Liedahl

Fournier

2003

ApJ

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“…Atomic structure calculations for highly ionized tungsten (Co-like W 47+ to Rb-like W 37+ ) were done by Fournier [23] with using the graphical angular momentum coupling code ANGULAR and the fully relativistic parametric potential code RELAC. The Hebrew University Lawrence Livermore Atomic Code hullac is also based on a relativistic model potential [24]. Ab-initio calculations with the hullac relativistic code was used for detailed analysis of spectral lines by by Zigler et al [19] and by May et al in Ref.…”

Section: Introductionmentioning

confidence: 99%

Relativistic many-body calculations of multipole (E1, M1, E2, M2, E3, and M3) transition wavelengths and rates between 3l−14l′ excited and ground states in nickel-like ions

Safronova

Hamasha

et al. 2006

Atomic Data and Nuclear Data Tables

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“…This requires accurate calculations of energy levels from atomic structure codes [46,47,48,49]. The next ingredient involves calculations of individual line intensities, which requires accurate wave function determination [50,51,18,52,53,54,55,56,57], followed by CR modelling [58,45,59,18].…”

Section: Description Of Modelling and Experimental Toolsmentioning

confidence: 99%

X-ray observations of medium Z H- and He-like ions with satellites from C-Mod tokamak plasmas

Rice¹,

Reinke²,

Ashbourn³

et al. 2015

J. Phys. B: At. Mol. Opt. Phys.

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X-ray spectra of H-and He-like ions (and satellites) from argon, calcium and chlorine have been obtained from Alcator C-Mod tokamak plasmas using a high resolution x-ray spectrometer system. For H-like charge states, the Ly α doublet intensity ratio is found to be slightly greater than 1/2 due to interaction with the 2 S 1/2 fine structure sub-level. Neighbouring satellites with spectator electrons occupying n = 2 through n = 7 have been modelled. The Ly α doublet ratio scalings with electron density and temperature are shown to be in good agreement with collisional-radiative modelling. For He-like ions, the n = 2 satellite intensities are in good agreement with calculations and can be used as an electron temperature diagnostic. The high n Rydberg series has been resolved up to 1s 2 -1s16p, and satellites with spectator electrons up to the n = 12 level have been identified.

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The 1s-3p Kβ-like x-ray spectrum of highly ionized iron

Cited by 360 publications

References 20 publications

The Fe xxii I (11.92 )/ I (11.77 ) Density Diagnostic Applied to the Chandra High Energy Transmission Grating Spectrum of EX Hydrae

The Fe xxii I (11.92 )/ I (11.77 ) Density Diagnostic Applied to the Chandra High Energy Transmission Grating Spectrum of EX Hydrae

Relativistic many-body calculations of multipole (E1, M1, E2, M2, E3, and M3) transition wavelengths and rates between 3l−14l′ excited and ground states in nickel-like ions

X-ray observations of medium Z H- and He-like ions with satellites from C-Mod tokamak plasmas

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