M1/E2/M2 decay rates in Fe VII, Fe IX, Fe X and Fe XIII measured using a heavy-ion storage ring

Träbert, E.; Calamai, Anthony G.; Gwinner, G.; Knystautas, Émile J.; Pinnington, E. H.; Wolf, A.

doi:10.1088/0953-4075/36/6/305

Cited by 45 publications

(56 citation statements)

References 35 publications

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“…However, for the models considered the changes to the M2 transitions were less than 1%, giving confidence in the SSTRUCT values. Träbert et al (2003) have determined a lifetime of 9.0±0.4 ms for the metastable 3 F 4 level which compares with the value 8.56 ms derived from the present calculations. The Kohstall et al (1998) calculations yield a lifetime of 9.17 ms.…”

Section: Comparison With Other Datasupporting

confidence: 87%

“…Good agreement is found with the forbidden transition calculations of Ishikawa & Vilkas (2001), Huang (1985) and Mendoza & Zeippen (1982), and also with the laboratory measurements of the 1 D 2 and 3 F 4 level lifetimes measured by Moehs et al (2001), Träbert et al (2002) and Träbert et al (2003). Good agreement is found for the allowed transitions calculated by Huang (1985), Fawcett (1987) and Kohstall et al (1998), with many branching ratios involving observed Fe  transitions being very similar.…”

Section: Discussionsupporting

confidence: 74%

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Radiative data for Fe XIII

Young

2004

A&A

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Abstract. New radiative data for allowed and forbidden transitions between the 3s 2 3p 2 , 3s3p 3 and 3s 2 3p3d configurations of Fe  are presented. The calculations are performed with the SSTRUCT atomic code, including 24 configurations in the model, and term energy corrections have been applied to optimise the theoretical level energies. The new data-set is compared with other calculations in the literature and also an unpublished calculation of Young that is found in the CHIANTI atomic database. Good agreement is found in all cases except with calculations of Nahar. Comparisons are also presented with laboratory and solar experimental data that demonstrate the accuracy of the present calculations. The new data are to be added to version 5 of the CHIANTI atomic database.

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Section: Comparison With Other Datasupporting

confidence: 87%

Section: Discussionsupporting

confidence: 74%

Radiative data for Fe XIII

Young

2004

A&A

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“…Further work has been A&A 514, A40 (2010) produced by a few other authors (e.g. Jupén et al 1993;Träbert et al 2003), however some level and line identifications were contradictory.…”

Section: The Target and The Line Identificationsmentioning

confidence: 99%

Atomic data from the IRON project

Zanna¹,

Storey

Mason³

2010

A&A

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A new R-matrix scattering calculation for electron collisional excitation of Fe xi is presented and compared to earlier calculations.The calculation includes 145 LS terms and 465 fine-structure levels and uses the intermediate-coupling frame transformation method (ICFT). We discuss the strong interactions that exist between three J = 1 levels in the 3s 2 3p 3 3d electron configuration. These levels give rise to strong lines in the EUV spectrum and their energies and identifications have been the source of much confusion in the literature. We show that the oscillator and collision strengths linking these levels to the ground levels of the ion are very sensitive to the choice of configuration basis and argue that most earlier calculations have failed to represent these levels adequately.

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“…Here, we use data from Jupen et al (1993), Trabert (1998), Träbert et al (2003). Another important contribution of these laboratory studies is the measurement of lifetimes and A values.…”

Section: Laboratory Data In the Xuv-visiblementioning

confidence: 99%

Benchmarking atomic data for astrophysics: Fe XII

Zanna¹,

Mason²

2005

A&A

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Abstract. We use recently calculated electron collisional data by Storey et al. (2005) for Fe  (n = 3 configurations) to build a model ion to compare to spectroscopic observations of the solar corona and laboratory measurements. We review all the line identifications of the brightest lines, by comparing both wavelengths and line intensities. The presence of blends in different plasma conditions is highlighted. A large number of new energy levels and line identifications are proposed. In particular, we identify the electric quadrupole 4 P e 5/2 -4 F e 9/2 transition with the bright coronal line observed at 592.6 Å, previously unidentified. This line, when observed with the 1242.0, 1349.5 UV forbidden lines, is a good density diagnostic over a large range of electron densities. We also indicate the best spectral lines to be used for density diagnostics or instrument calibration. From various combinations of lines we obtain electron densities that are significantly different from those published in the previous literature. Some examples are provided. The agreement between theory and experimental data in terms of wavelengths, line intensities and level lifetimes is excellent.

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M1/E2/M2 decay rates in Fe VII, Fe IX, Fe X and Fe XIII measured using a heavy-ion storage ring

Cited by 45 publications

References 35 publications

Radiative data for Fe XIII

Radiative data for Fe XIII

Atomic data from the IRON project

Benchmarking atomic data for astrophysics: Fe XII

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