I Latest explanation for "stability of high multiplicity states"

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Accurate quantum-mechanical calculations since the 1970s indicate that singly occupied orbitals are less shielded from the nucleus, leading to their contraction and an increase in electron-nucleus attraction energy. This phenomenon contributes to the stability of high multiplicity states in atomic systems. Users are seeking sources for these calculations, specifically referencing the Hartree-Fock self-consistent field method for atomic wavefunctions. The discussion highlights the importance of understanding electron interactions in determining atomic stability. Access to relevant papers and data is essential for further exploration of this topic.
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Latest explanation for "stability of high multiplicity states"
"However, accurate quantum-mechanical calculations (starting in the 1970s)... singly occupied orbitals are less effectively screened or shielded from the nucleus, so that such orbitals contract and electron–nucleus attraction energy becomes greater in magnitude (or decreases algebraically)."
https://en.wikipedia.org/wiki/Hund's_rules:
Where do I find these calculations, papers, or data?
Is the source the "Hartree-Fock self consistent field calculations for the wavefunctions of atoms?"
 
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