Free Access
Issue
Astron. Astrophys. Suppl. Ser.
Volume 119, Number 3, November I 1996
Page(s) 523 - 528
DOI https://doi.org/10.1051/aas:1996264
Published online 15 November 1996
Atomic data from the Iron Project. XVIII. Electron impact excitation collision strengths and rate coefficients for Fe III DOI: 10.1051/aas:1996264

Astronomy and Astrophysics Supplement Series, Vol. 119, November I 1996, 523-528

Atomic data from the Iron Project. XVIII. Electron impact excitation collision strengths and rate coefficients for Fe III

Hong Lin Zhang

Department of Astronomy, The Ohio State University, Columbus, OH 43210, U.S.A.
Internet: zhang@payne.mps.ohio-state.edu

Received January 17; accepted February 27, 1996

Abstract:

Collision strengths and maxwellian averaged rate coefficients have been calculated for 23 871 transitions among 219 fine structure levels, dominated by configurations , and in Fe III. Collision strengths are calculated using the R-matrix method with a 83 term close-coupling target expansion and for electron energies up to 10 rydbergs. Rate coefficients are tabulated at a wide range of temperatures at which Fe III is abundant in plasma sources. A brief discussion of the calculations and sample results are given. The present rates for Fe III are expected to find applications in spectral diagnostics of a variety of astrophysical sources.


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