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Ondřej Čertík and Peter Winkler Computation of screened two-electron matrix elements International Journal of Quantum Chemistry 113

Article first published online: 16 MAR 2013 | DOI: 10.1002/qua.24431

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Numerical results are presented for various atoms and Debye lengths showing the opposing effects of electron–nucleus and electron–electron screening, which may induce ambiguity in physical properties extracted from experimental plasma data. Different expansion methods have their best convergence properties in vastly different regions of the Debye screening length. A new expansion approach is presented in the case of the Debye screening but can also be generalized to other screening potentials.

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