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- W95790409 abstract "We study high-lying {sup 1}S doubly excited states (DES) of helium-like systems with principal quantum numbers N,n>>1. We calculate accurate eigenfunctions and eigenenergies using a large scale basis expansion and employing stabilization and complex rotation techniques. The wavefunctions are analyzed by projection onto three perpendicular planes of hyperspherical coordinates. We find the wavefunctions to display a regular pattern of nodal lines in a new coordinate system which differs from both the hyperspherical and molecular coordinates. Using this approximate separability, we derive a simple WKB formula for the position of all symmetrically excited {sup 1}S resonances which is in excellent agreement with the quantal calculation." @default.
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- W95790409 date "1993-05-01" @default.
- W95790409 modified "2023-09-28" @default.
- W95790409 title "Approximate separability of high-lying doubly excited {sup 1}S states of helium-like systems" @default.
- W95790409 hasPublicationYear "1993" @default.
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