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Atomic data from the IRON project - LI. Electron impact excitation of FeIX

Storey, PJ; Zeippen, CJ; Le Dourneuf, M; (2002) Atomic data from the IRON project - LI. Electron impact excitation of FeIX. ASTRON ASTROPHYS , 394 (2) 753 - 762. 10.1051/0004-6361:20021091. Green open access

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Abstract

We calculate collision strengths and thermally averaged collision strengths for electron excitation between the one hundred and forty energetically lowest levels of Fe8+. The scattering target is more elaborate than in any earlier work and large increases are found in the excitation rates among the levels of the 3s(2)3p(5)3d electron configuration due to resonance series that have not been considered previously. The implications for solar and stellar spectroscopy have been discussed elsewhere (Storey & Zeippen 2001). We correct some errors that were made in generating the figures given in that paper and present corrected versions.

Type: Article
Title: Atomic data from the IRON project - LI. Electron impact excitation of FeIX
Open access status: An open access version is available from UCL Discovery
DOI: 10.1051/0004-6361:20021091
Keywords: Sun : general, atomic data, Sun : UV radiation, EXTREME-ULTRAVIOLET SPECTRUM, STRUCTURE CROSS-SECTIONS, SOLAR ACTIVE-REGION, R-MATRIX METHOD, COLLISION STRENGTHS, DENSITY DIAGNOSTICS, REACTANCE MATRICES, GENERAL PROGRAM, IX, LINES
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10065
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