Chemical bond in FmO2

The density of electronic states and the XPS spectrum of FmO₂ valence electrons in the binding energy range from 0 to ∼40 eV have been calculated by the fully relativistic method of discrete variation. It is shown that the electrons of the outer and inner valence molecular orbitals (MOs) with binding energies from 0 to ∼15 eV and from ∼15 to ∼40 eV, respectively, contribute to the complex structure of the XPS spectrum of FmO₂. The FmO₂ MO diagram was constructed and the contribution of the electrons of the outer and inner valence MOs to the chemical bond was estimated.