Many-body perturbation theory (MBPT) calculations of the photoionization cross-section of atomic Sc have been performed from threshold to 70 eV. We consider excitations from the 3 p , 3 d , and 4 s subshells. Over a broad energy range, the 3 p → 3 d resonances, which are split into a number of multiplets, dominate the cross-section. The interaction between the resonances and the 3 p → kd channels is significant. Good qualitative agreement with experiment is found.
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Altun et al. (1996) studied this question.
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