
%0 Journal Article
%A Dzuba, VA 
%A Flambaum, VV 
%A King, WA 
%T Summation of the Dominating Diagrams in Many-body Perturbation Theory
%J Australian Journal of Physics
%D 1996/04/01
%V 49
%N 2
%P 231-246
%K 
%R https://doi.org/10.1071/PH960231
%U https://www.publish.csiro.au/paper/PH960231 
%X In this paper we present a description of an approach within many-body perturbation theory, which takes into account the infinite series of diagrams that describe screening and the interaction between the excited-core electron and the hole. We also present an extension to this theory that allows us to describe the interaction of a positron with an atom. To do this the infinite series of diagrams that describes virtual positronium formation is taken into account. Some results of these calculations are presented. 
