Comment on 'Resonant inelastic x-ray scattering from U₃O₈and UN'

In a recent manuscript, Lawrence Brightet al(2023J. Phys.: Condens. Matter35175501) reported the resonant inelastic x-ray scattering spectra of U₃O₈, as well as UN. Their goal was to identify electronic multiplets associated with a 5f¹configuration with ground state2F5/2. Complete active space self-consistent field with spin-orbit coupling (CASSCF-SOC) predicted that2F5/2transitions should be observable at 190 and 328 meV. However, these energies were not accessible in their experiment. They suggested that the recent inelastic neutron scattering results of Miskowiecet al(2021Phys. Rev.B103205101) could have been sensitive to these transitions. Here we show that transitions of this possible origin appear in that dataset near 198, 262, 362, and potentially 448 meV.