NDLI: R-matrix calculations for electron impact excitation of Fe II: LS coupling and Breit-Pauli approximations

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R-matrix calculations for electron impact excitation of Fe II: LS coupling and Breit-Pauli approximations

Content Provider	Scilit
Author	Pradhan, A. K. Berrington, K. A.
Copyright Year	1993
Description	Journal: Journal of Physics B: Atomic, Molecular and Optical Physics Two sets of close coupling calculations have been carried out on the Cray-2 and the Cray Y-MP using the R-matrix method: (i) a 38-term calculation in LS coupling and (ii) a 41-level fine structure calculation in the Breit-Pauli approximation. The first set includes the quartet and sextet terms dominated by the configurations $3d^{6}$4s, $3d^{7}$ and $3d^{6}$4p and collision strengths are calculated for all 703 transitions in LS coupling. The second set of calculations is carried out using the Breit-Pauli version of the R-matrix method and includes a number of the important fine structure levels from the quartet and the sextet multiplets and 820 corresponding transitions. Detailed autoionization structures are obtained in both sets of collision strengths, and a significant enhancement is seen in the effective collision strengths for a number of transitions due to the resonances: for example, an enhancement of factors of 1.4, 2.5 and 1.15 respectively for transitions from the$ ^{6}$D ground term to the lowest$ ^{4}$F,$ ^{4}$D and$ ^{4}$P terms.
Related Links	http://iopscience.iop.org/article/10.1088/0953-4075/26/1/016/pdf
Ending Page	172
Page Count	16
Starting Page	157
ISSN	09534075
e-ISSN	13616455
DOI	10.1088/0953-4075/26/1/016
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Issue Number	1
Volume Number	26
Language	English
Publisher	IOP Publishing
Publisher Date	1993-01-01
Access Restriction	Open
Subject Keyword	Journal: Journal of Physics B: Atomic, Molecular and Optical Physics Nuclear Physics Fine Structure Electron Impact
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics

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