An efficient screening approach to be used in plasma modeling and ion-surface collision experiments

Abstract

In this work we show that the Layzer theory for atomic calculations provides a theoretical framework and also a powerful computational approach if correct rules for the calculation of the screening parameters are given. Using the virial as a model for potential energy and splitting of two-body operators as sum of onebody operators, a neat definition of screening is given, satisfying diverse physically indispensable properties. Many different experimental and theoretical results are reproduced with high accuracy, with no fitting procedure involving energy levels or numerical potentials. A C ++ code and an executable file are available upon request.

The combined use of screening and quantum defect parameters in the study of ionized atoms

“…We will leave this very important topic to a future work (in progress [11]) and, for the purposes of the present paper, we can consider the s nl as constants. The more refined approach [11] is based in a serie of papers by Kregar [12] and one of us (HODR [13]) and can be generalized to the relativistic treatment of complex atoms and ions. While it is true that the use of screening constants is immediate, the use of screening parameters gives better agreement with experimental energy values.…”