SIMBAD references

1999ApJS..123..295G - Astrophys. J., Suppl. Ser., 123, 295-309 (1999/July-0)

Electron impact excitation of fine-structure levels in sulfur-like Fe XI.

GUPTA G.P. and TAYAL S.S.

Abstract (from CDS):

Collision strengths for electron impact excitation of fine-structure levels in sulfur-like Fe XI are calculated in a semirelativistic R-matrix approach. The 38 fine-structure levels arising from the 20 LS states 3s23p4 3P, 1D, 1S; 3s3p5 3P0, 1P0; 3s23p3(4S0)3d 3D0, 3s23p3(2P0)3d 1,3P0, 1,3D0, 1,3F0, 3s23p3(2D0)3d 1,3S0, 1,3P0, 1,3D0, 1,3F0 are included in our calculation. The target levels are represented by configuration interaction wave functions. The relativistic effects are considered in the Breit-Pauli approximation by including one-body mass correction, Darwin term, and spin-orbit terms in the scattering equations. Collision strengths for transitions from the 3s23p4 3P2,1,0 levels to the fine-structure levels of the 3s23p33d configuration are compared with the distorted-wave results of Bhatia & Doschek at 8.0, 16.0, 24.0 ryd. There are some significant discrepancies between the two calculations, mostly caused by the difference in target wave functions. The collision strengths are integrated over a Maxwellian distribution of electron energies to obtain effective collision strengths over the temperature range from 5x105 to 5x106 K.

Abstract Copyright:

Journal keyword(s): Atomic Data - Atomic Processes

VizieR on-line data: <Available at CDS (J/ApJS/123/295): table1.dat table2.dat table3.dat>

Simbad objects: 0

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