However, we also see from the experimental spectra for excitation at 694.6 eV, which is believed to excite to both 6t 1u and 7t 1u orbitals, the polarization dependence is not as prominent as seen for example in the |F1s -1 6a 1 1g resonance. This could be due tot the fact that the core excitation actually involves both σ and π symmetry t 1u orbitals.