Picture of a sphere with binary code

Making Strathclyde research discoverable to the world...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. It exposes Strathclyde's world leading Open Access research to many of the world's leading resource discovery tools, and from there onto the screens of researchers around the world.

Explore Strathclyde Open Access research content

Atomic data from the IRON project LXIII : Electron-impact excitation of Fe19+ up to n=4

Witthoeft, M. C. and Del Zanna, G. and Badnell, N. R. (2007) Atomic data from the IRON project LXIII : Electron-impact excitation of Fe19+ up to n=4. Astronomy and Astrophysics, 466 (2). pp. 763-770. ISSN 0004-6361

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

We present results for the electron-impact excitation of N-like Fe as part of the RmaX network. R-matrix theory using an intermediatec-oupling frame transformation method is used to obtain level-resolved collision strengths. Separate calculations are performed using different target expansions. The first is a 215 level close-coupling calculation which has the 2s(2) 2p(3), 2s 2p(4), 2p(5), 2s(2) 2p(2) 3l, and 2s 2p3 3l configurations while the second calculation also includes the levels from the 2s(2) 2p(2) 4l configurations for a total of 302 close-coupling levels. The effect of the additional resonant enhancement of the larger calculation is explored and compared with a previous IRON Project report and other, more recent, calculations. As a final comparison, we model an astrophysical plasma using the results of the present calculations and previous work.