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 polar izations in the electron energy region where the doubly excited autoionizin g states contribute significantly to the DCS and the linear polarization ar e presented for an angle of 90 degrees with respect to the electron beam di rection. 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 per formed with the close coupling R-matrix computer programs including the rel ativistic effects. The lowest 13 lithium-like states were included to repre sent the target in the R-matrix internal region. (C) 1999 Elsevier Science B.V. All rights reserved.