Collision Strengths from Ground Levels of Fe <scp>xvii</scp> by Including Relativistic Term Coupling Effects

Abstract

The R-matrix method is used to calculate collision strengths from ground state to the first 26 fine-structure levels of Fe XVII by including the relativistic term coupling coefficients in the semi-Breit-Pauli approximation. Configuration interaction wave functions are used to represent the 15 lowest LS-coupled target states in the R-matrix expansion. Results obtained are compared with the other distorted wave calculations.