Abstract
Lifetimes of fine-structure levels in 2s2p3p 4D and 2s2p3d 4Fo quartets are calculated in the boron isoelectronic sequence, for C II to F V, using a multiconfiguration Hartree-Fock approach. These quarters are known from earlier experimental and theoretical studies to have different lifetimes for different J-levels, owing to spin-induced transitions, mainly to doubler states in 2s22p and 2s2p2 configurations. Present work reproduces adequately the experimental features in F V and O IV. We also predict a weak J-dependency of the lifetimes in N III, in contrast to earlier measurements.
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