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We have determined lifetimes of the 12 4d95p fine-structure levels of AgII, using the beam-foil excitation method. The results are compared with various theoretical predictions. Fairly good agreement is found with recent superposition-of-configurations (SOC) calculations which have included relativistic corrections. r] Ld8 5s2Ld9 5p

This paper reports an extended experimental investigation, using the beamfoil technique, of the intensity ratio of the fine-structure components in the 3s23p 2Pl,,, 3,2-3s3p2 2S,,, and 2Pl,, resonance transitions along the AI I isoelectronic sequence. These intensity ratios are strongly influenced by cancellation/enhancement effects arising from spin-orbit induced level mixings, and are thus sensitive probes of the detailed atomic structure. New data are given for Si 11, P 111, S IV, K VII, Sc IX, Fe XIV and Ni XVI.Together with previous experimental results this comprehensive isoelectronic study reveals significant and systematic deviations from theoretical predictions.