Eur. Phys. J. D 47, 37-44 (2008)
https://doi.org/10.1140/epjd/e2008-00018-2

Screening constant by unit nuclear charge calculations for (n s²)¹S^e, (np²)¹D^e and (N s n p)¹P° excited states of He-like systems

University Cheikh Anta Diop, Department of physics, Atoms Laser Laboratory, 12500 Dakar, Senegal

Corresponding author: ^a aminafatima_sakho@yahoo.fr

Received: 7 December 2006
Revised: 27 February 2007
Published online: 8 February 2008

Abstract

Screening Constant by Unit Nuclear Charge (SCUNC) is a new analytical method suitable for the treatment of the properties of He-like systems. In this paper, the possibilities of the method are demonstrated for calculating in the framework of semi-empirical procedure, total energies, total electron-electron interaction energies and excitation energies for (ns²)¹S^e, (np²)¹D^e and (Nsnp)¹P° doubly excited states of He-like ions. The proposed semi-empirical scheme, leads to accurate results in good agreement as well as with available other theoretical results than experimental data.