https://doi.org/10.1140/epjp/i2015-15083-7
Regular Article
Construction of the energy matrix for complex atoms Part III: Excitation of two equivalent electrons from a closed shell into an open shell or an empty shell
1
Laboratory of Quantum Engineering and Metrology, Faculty of Technical Physics, Poznań University of Technology, 60-965, Poznań, Poland
2
Institute of Control and Information Engineering, Faculty of Electrical Engineering, Poznań University of Technology, 60-965, Poznań, Poland
* e-mail: magdalena.elantkowska@put.poznan.pl
Received:
11
March
2015
Revised:
27
March
2015
Accepted:
30
March
2015
Published online:
29
April
2015
The effects of the second-order configuration interaction perturbations on the energy-level structure of nl
N
, 
and 
configurations have been studied. In the previous works (see Part I and II) we presented a method, which allows to analyse complex electronic systems composed of configurations including up to four open shells and the formulae for the first-order electrostatic interaction between sophisticated configurations. In the present paper we consider two-electron core excitations for and between the configurations under study. They constitute the basis for the design of an efficient computer program package allowing large-scale calculations providing accurate wave functions.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2015
