A Cartesian tensor method unifies orientation averaging for XAS and RIXS, enabling ab initio predictions of angular and polarization dependence that match Ce L3 edge experiments.
Its orientation average is: ⟨σE1E1 RIXS⟩= X ijkl ε∗ i,iεo,j ⟨Q⟩ε i,kε∗ o,l (28) withε i (εo) the incoming (outgoing) polarization
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Unified theory of orientation averaging in X-ray spectroscopies: understanding polarization dependence in a Cartesian tensor approach
A Cartesian tensor method unifies orientation averaging for XAS and RIXS, enabling ab initio predictions of angular and polarization dependence that match Ce L3 edge experiments.