CROSS-SECTIONS AND RATE COEFFICIENTS FOR INNER-SHELL EXCITATION OF LI-LIKE IONS WITH 6-LESS-THAN-Z-LESS-THAN-42

Excitation cross sections and rate coefficients by electron impact wer e calculated for the 1s(2)2s-1s2s2p, 1s(2)2s-1s2s(2) and 1s(2)2s-1s2p( 2) transitions of the Li-like ions (CIV, N V, O VI, Ne VIII, Mg X, Al XI, Si XII, S XIV, Ar XVI, Ca XVIII, Ti XX, Fe XXIV, Ni XXVI, Zn XXVII I, Ge XXX, Se XXXII, Kr XXXIIV and Mo XXXX) in the Coulomb-Born approx imation with exchange including relativistic effects and configuration interaction. Level energies, mixing coefficients and transition wavel engths and probabilities were also computed. Calculations performed by the 1/Z perturbation theory and Coulomb-Born approximation are compar ed with the R-matrix method and the distorted-wave approximation were Z is the nuclear charge. Formulae obtained for the angular factors of n-electron atomic system allow one to generalize this method to an arb itrary system of highly charged ions.