EFFECTIVE COLLISION STRENGTHS FOR TRANSITIONS IN O-III

Effective collision strengths for transitions among 26 LS-coupled states of the (1s2) 2s22p2, 2s2p3, 2p4, 2s22p3s, 2s22p3p, and 2s22p3d configurations of O III are reported in a wide electron temperature range of 2500-200,000 K. Collision strengths for these transitions have been computed at energies below 13.1 Ry in a fine mesh of energy elucidating resonances using the standard and no-exchange R-matrix programs for L less-than-or-equal-to 12 and 12 < L less-than-or-equal-to 40, respectively. For transitions involving the states of (1s22s22p) 3s, 3p, and 3d configurations the results are reported for the first time. However, for the rest of the transitions comparisons are made with the earlier available values of effective collision strengths, differences are discussed and accuracy is assessed.