Line strengths and transition probabilities for allowed transitions in Fe XXI

Configuration interaction wavefunctions, transition energies, line strengths and transition probabilities for allowed transitions within the n=2 complex of C-like Fe XXI have been calculated in the LS coupling scheme. We included internal, semi-internal, and all-external types of correlations. We compare our non-relativistic line strengths values with those of relativistic calculations in the Breit-Pauli approximation. The relativistic effects on line strengths are negligible for all transitions except for the transition 1De→1D0. Experimental wavelengths are used in the calculation of transition probabilities. (orig.)