TITLE:
Variational Calculations of Energies of the (2snl) 1,3Lπ and (2pnl) 1,3 LπDoubly Excited States in Two-Electron Systems Applying the Screening Constant per Unit Nuclear Charge
AUTHORS:
Momar Talla Gning, Ibrahima Sakho, Maurice Faye, Malick Sow, Babou Diop, Jean Kouhissoré Badiane, Diouldé Ba, Abdourahmane Diallo
KEYWORDS:
Doubly Excited States, Helium Isoelectronic Sequence, Screening Constant per Unit Nuclear Charge (SCUNC), Correlated Wave Function, Resonance Energy, Excitation Energies
JOURNAL NAME:
Journal of Modern Physics,
Vol.12 No.3,
February
26,
2021
ABSTRACT: In this paper, resonance energies and excitation energies of doubly 2sns 1,3Se, 2snp 1,3P0, 2pnp 1,3De, 2pnd 1,3F0 and 2pnf 1,3Ge excited states of the helium isoelectronic sequence with Z ≤ 10 are calculated. Calculations are carried out in the framework of the variational procedure of the formalism of the Screening Constant per Unit Nuclear Charge (SCUNC). New correlated wave function of Hylleraas type is used. Precise resonance and excitation energies are tabulated and good agreement is obtained when a comparison is made with available literature values.