Atomic data from the Iron Project. XVIII. Electron impact excitation collision strengths and rate coefficients for Fe III.
Abstract
Collision strengths and maxwellian averaged rate coefficients have been calculated for 23 871 transitions among 219 fine structure levels, dominated by configurations 3 d^6^, 3d^5^4s, and 3d^5^4p in Fe III. Collision strengths are calculated using the Rmatrix method with a 83 term closecoupling 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.
 Publication:

Astronomy and Astrophysics Supplement Series
 Pub Date:
 November 1996
 Bibcode:
 1996A&AS..119..523Z
 Keywords:

 ATOMIC DATA;
 ATOMIC PROCESSES