Multiplet splitting of manganese core p-levels in MnF2

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Abstract
High-resolution X-ray emission spectroscopy (XES) is used to measure splittings of core p-hole final states of Mn2+ ions in MnF2. It turns out that the Hartree-Fock free-ion approximation, including spin-orbit and crystal-field effects, is inadequate for a proper interpretation of the Mn K alpha 1,2 and K beta 1 structures. A comparison is made with the corresponding core p-level X-ray photoemission spectra (XPS). The observed 2p XES multiplet splitting is absent in the XPS in spite of narrower linewidths obtained by XPS. The K alpha 1 and K alpha 2 lines in MnF2 are broadened by 1.35 and 0.97 eV, respectively, while at least a 1.3 eV broadening of both 2p XPS levels is reported. The discrepancies between the XES and XPS may indicate importance of non-lifetime contributions to intrinsic XPS linewidths in MnF2.
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