LS -coupling photoabsorption cross section of the 3p⁶3d²³F ground state of Ca-like Zn XI computed with BPRM (black curve) and AUTOSTRUCTURE (red curve). Panel a: valence and L-edge regions; the BPRM cross section has been convolved with a Gaussian of width ΔE/E = 0.001. Panel b: K-edge region. Panel c: K-edge region where the AUTOSTRUCTURE cross section has been computed excluding the non-fine-structure relativistic corrections leading to a large positional discrepancy in the resonance structure.