Abstract
Collision strengths for electron induced tran- sitions in Li-like Fe xxiv are calculated using a Breit- Pauli R-matrix technique. The target has 15 ne struc- ture states corresponding to n 4. Autoionizing reso- nances are found to aect 18 of the 39 collision strengths, namely those for transitions 2lj!n 0 l 0 j 0 where n 0 =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 use the relativistic distorted wave collision strengths of Zhang et al. in order to complete our results. Thermally averaged collision strengths are com- puted and tabulated as functions of logT for transitions out of the 2s1=2 ,2 p 1 = 2 and 2p3=2 states. The temperature range considered is 6:2 log T 8:0, Fe xxiv having its maximum coronal abundance when logT =7 :2.
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