The fluorine K-edge XE spectrum of SF 6 has been measured by Ekholm and coworkers , where SF 6 was photo-excited at 751.4 eV. This photon energy selected is to be above any distinct resonances in the XA spectrum in order to probe a non-resonant decay process. Essentially, the XE process involves decay of the core ionized state |CI into valence ionized states |V I n=1,2,3,... , and hence provides the spectroscopic signatures corresponding to the valence orbitals, that are occupied in |V I 1 . There are six F1s core-ionized states, also when localized, but because the fluorine sites are chemically equivalent, it is at our level of approximation sufficient to consider only one localized |CI . Consequently, similarly to absorption, the molecular symmetry of the decaying orbitals does not come into play. Due to dipole selection rules, the XE spectrum is a result of emission originating in the decay of electrons from valence occupied orbitals, primarily having F2p character, to the ionized F1s corehole.