caa a22 4500 477060277 CHVBK 20180405111358.0 cr unu---uuuuu 170330e19960201xx s 000 0 eng 10.1007/BF02067684 doi (NATIONALLICENCE)springer-10.1007/BF02067684 Determination of excited atomic state energies in a minimax procedure, as exemplified by the 1 s 2 s 1 S state of the He atom [Elektronische Daten] [V. Zelichenko, E. Koryukina] Problems in the use of a new variational approach to calculate excited states of multielectron systems with lower-lying states of the same symmetry are discussed. The approach is based on use of a minimax technique to determine the saddle points of the energy functional, where the energy values are upper limits on the corresponding eigenvalues of the Hamiltonian and are subject to improvement. The energy of the1s2s 1 S state of the He atom is calculated in a detailed example. Plenum Publishing Corporation, 1996 Zelichenko V. Tomsk State Pedagogical Institute, USSR aut Koryukina E. Tomsk State Pedagogical Institute, USSR aut Russian Physics Journal Kluwer Academic Publishers-Plenum Publishers 39/2(1996-02-01), 175-180 1064-8887 39:2<175 1996 39 11182 https://doi.org/10.1007/BF02067684 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02067684 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zelichenko V. Tomsk State Pedagogical Institute, USSR aut NATIONALLICENCE 700 1- Koryukina E. Tomsk State Pedagogical Institute, USSR aut NATIONALLICENCE 773 0- Russian Physics Journal Kluwer Academic Publishers-Plenum Publishers 39/2(1996-02-01), 175-180 1064-8887 39:2<175 1996 39 11182 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer