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 (https://doi.org/10.1051/0004-6361:20066782)

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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.

  • Item type:Article
    ID code:31179
    Dates:
    Date
    Event
    May 2007
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:01 Jul 2011 14:28
    Last modified:08 Apr 2024 19:06
    URI:https://strathprints.strath.ac.uk/id/eprint/31179
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