On the 3p-subshell photoabsorption spectra of iron-group ions: the case of Mn²⁺

The photoabsorption spectrum of doubly ionized manganese in the 45–75 eV photon energy range, where inner-shell 3p–3d and 3p–4s (and higher 3p–nl) transitions are induced, has been measured using a dual laser plasma technique. It compares favourably with the theoretical cross-section profile of Dolmatov (1996 J. Phys. B: At. Mol. Opt. Phys. 29 L687) and confirms his prediction that, between Mn+ and Mn2+, not only do the 3p–4s resonances swap over to the high energy side of the giant 3p–3d resonance but also that this reordering has significant effects on resonance profiles in doubly ionized manganese.

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