In summary we have presented the most complete calculation of both total and partial photoionization cross sections for Fe XVIII yet available. We note the favorable comparison with previous work. However, a much greater resolution and target state representation as well as the inclusion of fine structure effects results in a lower background as well as a substantially greater resolution of resonance structure. Finally we note that the calculations presented within this publication are a clear indication of the need for the inclusion of relativistic effects in calculations concerning highly ionized iron.
DD would like to thank PPARC for financial support. All R-matrix calculations were performed on the CRAY J932 located at the Rutherford Appleton Laboratory.
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