Differential cross sections and polarizations of Fe XXIV L-shell line emission produced by electron impact excitation

Theoretical results for L-shell X-ray differential cross sections and polarizations in the electron energy region where the doubly excited autoionizing states contribute significantly to the DCS and the linear polarization are presented for an angle of 90 degrees with respect to the electron beam direction. The particular X-ray transition considered is from the 1s(2)3p P-2(3/2) excited state to the ground state of Fe23+. The calculations were performed with the close coupling R-matrix computer programs including the relativistic effects. The lowest 13 lithium-like states were included to represent the target in the R-matrix internal region. (C) 1999 Elsevier Science B.V. All rights reserved.