Electron collisional excitation of O V: effect of resonances converging to the n=3 thresholds

The 2s 2 1 S e -2s2p 3 P o and 2s 2 1 S e -2s2p 1 P o transitions in O V are calculated using the R-matrix method. Twelve target eigenstates consisting of the size n=2 states with configurations 2s 2 , 2s2p and 2p 2 and the six n=3 states with configurations 2s3s, 2s3p and 2s3d are included in the expansion of the total wavefunction. The resonances converging to the n=3 thresholds increase the 2s 2 1 S e -2s2p 3 P o collision strength by about a factor of two and the 2s 2 1 S e -2s2p 1 P o collision strength by over 10% below these thresholds.