Atomic data from the IRON Project. XXIV. Electron excitation of Lilike Fe XXIV between the N = 2 and n' = 2, 3, 4 finestructure levels
Abstract
Collision strengths for electron induced transitions in Lilike Fe xxiv are calculated using a BreitPauli Rmatrix technique. The target has 15 fine structure states corresponding to n <= 4. Autoionizing resonances are found to affect 18 of the 39 collision strengths, namely those for transitions 2lj to 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 use the relativistic distorted wave collision strengths of Zhang et al. in order to complete our results. Thermally averaged collision strengths are computed and tabulated as functions of log T for transitions out of the 2s_{1/2}, 2p_{1/2} and 2p_{3/2} states. The temperature range considered is 6.2 <= log T <= 8.0, Fe xxiv having its maximum coronal abundance when log T = 7.2.
 Publication:

Astronomy and Astrophysics Supplement Series
 Pub Date:
 November 1997
 DOI:
 10.1051/aas:1997384
 Bibcode:
 1997A&AS..126..105B
 Keywords:

 LILIKE IRON;
 ELECTRON COLLISION;
 ATOMIC DATA