Ab initio calculations including relativistic effects employing the Breit-Pauli R-matrix ( BPRM ) method are reported for fine structure energy levels and oscillator strengths upto n = 10 and 0 \leq l \leq 9 for 15 Li-like ions : C IV , N V , O VI , F VII , Ne VIII , Na IX , Mg X , Al XI , Si XII , S XIV , Ar XVI , Ca XIII , Ti XX , Cr XXII , and Ni XXVI .
About one hundred bound fine structure energy levels of total angular momenta , 1/2 \leq J \leq 17/2 of even and odd parities , total orbital angular momentum , 0 \leq L \leq 9 and spin multiplicity ( 2S+1 ) = 2 , 4 are considered for each ion .
The levels provide almost 900 dipole allowed and intercombination bound-bound transitions .
The BPRM method enables consideration of large set of transitions with uniform accuracy compared to the best available theoretical methods .
The CC eigenfunction expansion for each ion includes the lowest 17 fine structure energy levels of the core configurations 1 s ^ { 2 } , 1 s 2 s , 1 s 2 p , 1 s 3 s , 1 s 3 p , and 1 s 3 d .
The calculated energies of the ions agree with the measured values to within 1 % for most levels .
The transition probabilities show good agreement with the best available calculated values .
The results provide the largest sets of energy levels and transition rates for the ions and are expected to be useful in the analysis of X-ray and EUV spectra from astrophysical sources .