Photoionization of neutral iron
- 28 March 1995
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 28 (6) , L173-L179
- https://doi.org/10.1088/0953-4075/28/6/004
Abstract
Accurate calculations are reported for the photoionization of the ground and the excited states of Fe I with an extensive coupled channel expansion using the R-matrix method. A total of 52 LS terms of the core ion Fe II dominated by configurations 3d64s, 3d7, 3d64p, 3d54s2, 3d54s4p are included; these eigenstates thereby account for the photoionization of the outer 4s subshell as well as the open inner 3d subshell of the ground state 3d64s2(5D) of Fe I. The coupling of all relevant photoionization channels give rise to extensive autoionization structures and ensure that no large and sharp discontinuity at the 3d inner-shell ionization edge is present. The new results differ by up to several orders of magnitude from earlier data in central field type approximations that are currently employed in plasma modelling of astrophysical and laboratory sources.Keywords
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