Calculations Energy of the (<i>nl</i><sup>2</sup>) <sup>1</sup><i>L<sup>π</sup></i>Doubly Excited States of Two-Electron Systems via the Screening Constant by Unit Nuclear Charge Formalism

作     者：Momar Talla Gning Ibrahima Sakho Malick Sow Momar Talla Gning;Ibrahima Sakho;Malick Sow

作者机构：Department of Experimental Sciences UFR Sciences and Technologies University of Thies Thies Senegal Atoms Laser Laboratory Department of Physics Faculty of Sciences and Technologies University Cheikh Anta Diop Dakar Senegal 

出 版 物：《Journal of Modern Physics》 (现代物理（英文）)

年 卷 期：2020年第11卷第11期

页      面：1891-1910页

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

主　　题：Doubly Excited States Helium-Like Systems Screening Constant by Unit Nuclear Charge (SCUNC) Wave Functions Correlated Total Energy 

摘      要：In this work, the total energies of doubly excited states (ns2) 1Se, (np2) 1De, (nd2) 1Ge, (nf2) 1Ie, (ng2) 1Ke, and (nh2) 1Me of the helium isoelectronic sequence with Z ≤ 10 are calculated in the framework of the variational method of the Screening Constant by Unit Nuclear Charge (SCUNC). These calculations are performed using a new wavefunction correlated to Hylleraas-type. The possibility of using the SCUNC method in the investigation of high-lying Doubly Excited States(DES) in two-electron systems is demonstrated in the present work in the case of the (nl2) 1Lπ doubly excited states, where accurate total energies are tabulated up to n = 20. All the results obtained in this paper are in agreement with the values of the available literature and may be useful for future experimental and theoretical studies on the doubly excited (nl2) 1Lπ states of two-electron systems.