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- W2007172406 abstract "A particular set of two-electron atomic resonances for the helium atom with zero total orbital angular momentum (S states) has been recently studied theoretically [K. Richter and D. Wintgen, J. Phys. B 24, L565 (1991)]. These resonances essentially have both electrons on the same side of the nucleus and the outer electron ``frozen.'' The present work suggests that the energies of these resonances correspond, when the degree of excitation of both electrons increases, to the energies of resonances associated with the Hamiltonian H=${mathit{p}}^{2}$/2+p${mathcal{'}}^{2}$/2-Z/r-Z/r'+1/ensuremath{Vert}ensuremath{Vert}rensuremath{Vert}-ensuremath{Vert}r'ensuremath{Vert}ensuremath{Vert} in a space where both particles have zero angular momentum (scrl=scrl'=0). Moreover, the energy of each of these resonances appears to be that of the lowest member of an almost unperturbed Rydberg series of resonances converging to a single ionization threshold of He. The analysis of the problem relies on the method of o(4,2) operator replacements generalized by the method of complex scaling." @default.
- W2007172406 created "2016-06-24" @default.
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- W2007172406 date "1992-09-01" @default.
- W2007172406 modified "2023-09-24" @default.
- W2007172406 title "Helium doubly excited states with zero angular momentum and electrons located on the same side of the nucleus" @default.
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- W2007172406 doi "https://doi.org/10.1103/physreva.46.2344" @default.
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