ATOMIC DATA FROM THE IRON PROJECT .24. ELECTRON-EXCITATION OF LI-LIKEFE-24 BETWEEN THE N=2 AND N'=2, 3, 4 FINE-STRUCTURE LEVELS

Collision strengths for electron induced transitions in Li-like Fe XXI V are calculated using a Breit-Pauli R-matrix technique. The target ha s 15 fine structure states corresponding to n less than or equal to 4. Autoionizing resonances are found to affect 18 of the 39 collision st rengths, namely those for transitions 2lj --> n'l'j' where n' = 2, 3. The present calculation is carried out only for electrons incident on the ground state with energies not exceeding 265 Ry. Beyond this we us e the relativistic distorted wave collision strengths of Zhang et al. in order to complete our results. Thermally averaged collision strengt hs are computed and tabulated as functions of log T for transitions ou t of the 2s(1/2), 2p(1/2) and 2p(3/2) states. The temperature range co nsidered is 6.2 less than or equal to log T less than or equal to 8.0, Fe XXIV having its maximum coronal abundance when log T = 7.2.