Electron-impact excitation of Fe2+ : a comparison of intermediate coupling frame transformation, Breit-Pauli and Dirac R-matrix calculations

Badnell, N. R. and Ballance, C. P. (2014) Electron-impact excitation of Fe2+ : a comparison of intermediate coupling frame transformation, Breit-Pauli and Dirac R-matrix calculations. Astrophysical Journal, 785 (2). ISSN 1538-4357 (https://doi.org/10.1088/0004-637X/785/2/99)

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Abstract

Modeling the spectral emission of low-charge iron group ions enables the diagnostic determination of the local physical conditions of many cool plasma environments such as those found in H II regions, planetary nebulae, active galactic nuclei, etc. Electron-impact excitation drives the population of the emitting levels and, hence, their emissivities. By carrying-out Breit-Pauli and intermediate coupling frame transformation (ICFT) R-matrix calculations for the electron-impact excitation of Fe2 +, which both use the exact same atomic structure and the same close-coupling expansion, we demonstrate the validity of the application of the powerful ICFT method to low-charge iron group ions. This is in contradiction to the finding of Bautista et al., who carried-out ICFT and Dirac R-matrix calculations for the same ion. We discuss possible reasons.

ORCID iDs

Badnell, N. R. ORCID logoORCID: https://orcid.org/0000-0001-7418-7996 and Ballance, C. P.;
  • Item type:Article
    ID code:54154
    Dates:
    Date
    Event
    1 April 2014
    Published
    17 February 2014
    Accepted
    Subjects:Science > Astronomy
    Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:03 Sep 2015 15:45
    Last modified:11 Nov 2024 11:10
    URI:https://strathprints.strath.ac.uk/id/eprint/54154
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