TITLE:
Energy Positions of the 1,3De Rydberg Series of the He-Like Ions Up to the N = 9 Threshold
AUTHORS:
Matabara Dieng, Babou Diop, Malick Sow, Youssou Gning, Mamadi Biaye, Ababacar Sadikhe Ndao, Ahmadou Wagué
KEYWORDS:
Electronic Correlations, Variational Calculations, Atoms And Ions, Helium-Like Systems, Singlet States, Triplet States, Matrix Elements, Doubly-Excited States, Autoionization
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.8 No.8,
August
20,
2020
ABSTRACT: The doubly excited states of helium-like ions are investigated using a combination of the no-linear parameters of Hylleraas and the β-parameters of screening constant by unit nuclear charge. Calculations are performed for total energies of low-lying doubly excited states (N = 2 - 9) in He-like ions up to Z = 10. The results obtained from the novel method are in good agreement with the available theoretical calculations and experimental observations.