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Variational Calculations of Energies of the (2<i>snl</i>) <sup>1,3</sup><i>L<sup>π</sup></i> and (2<i>pnl</i>) <sup>1,3 </sup><i>L<sup>π</sup></i>Doubly Excited States in Two-Electron Systems Applying the Screening Constant per Unit Nuclear Charge
Department of Physics Chemistry, UFR Sciences and Technologies, University of Thies, Thies, Senegal
Department of Physics Chemistry, UFR Sciences and Technologies, University of Thies, Thies, Senegal
Department of Physics Chemistry, UFR Sciences and Technologies, University of Thies, Thies, Senegal
Department of Physics, Faculty of Sciences and Techniques, University Cheikh Anta Diop of Dakar, Dakar, Senegal
Department of Physics, Faculty of Sciences and Techniques, University Cheikh Anta Diop of Dakar, Dakar, Senegal
Department of Physics, UFR Sciences and Technologies, University Assane Seck of Ziguinchor, Ziguinchor, Senegal
Department of Physics, UFR Sciences and Technologies, University Assane Seck of Ziguinchor, Ziguinchor, Senegal
Department of Physics, UFR Sciences and Technologies, University Assane Seck of Ziguinchor, Ziguinchor, Senegal
- 1 Department of Physics Chemistry, UFR Sciences and Technologies, University of Thies, Thies, Senegal
- 2 Department of Physics Chemistry, UFR Sciences and Technologies, University of Thies, Thies, Senegal
- 3 Department of Physics Chemistry, UFR Sciences and Technologies, University of Thies, Thies, Senegal
- 4 Department of Physics, Faculty of Sciences and Techniques, University Cheikh Anta Diop of Dakar, Dakar, Senegal
- 5 Department of Physics, Faculty of Sciences and Techniques, University Cheikh Anta Diop of Dakar, Dakar, Senegal
- 6 Department of Physics, UFR Sciences and Technologies, University Assane Seck of Ziguinchor, Ziguinchor, Senegal
- 7 Department of Physics, UFR Sciences and Technologies, University Assane Seck of Ziguinchor, Ziguinchor, Senegal
- 8 Department of Physics, UFR Sciences and Technologies, University Assane Seck of Ziguinchor, Ziguinchor, Senegal
Journal of Modern Physics·Volume 12 (2021)·Pages 328–352·Published 7 February 2021·DOI10.4236/jmp.2021.123024
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Abstract
In this paper, resonance energies and excitation energies of doubly 2 sns 1,3 S e , 2 snp 1,3 P 0 , 2 pnp 1,3 D e , 2 pnd 1,3 F 0 and 2 pnf 1,3 G e 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.
KeywordsDoubly Excited StatesHelium Isoelectronic SequenceScreening Constant per Unit Nuclear Charge (SCUNC)Correlated Wave FunctionResonance EnergyExcitation Energies
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