Abstract
The paper reports lifetime measurements of quartet levels in the 2s2p3p and 2s2p3d configurations in B-like oxygen, O IV, by means of the beam-foil technique. Reliable decay-times are obtained by explicitly including the dominant cascade repopulation in the decay curve analyses through the non-linear ANDC method. Different fine-structure levels in the 3p 4D and 3d 4F terms are found to have significantly different lifetimes due to the occurrence of spin-forbidden and Delta L=2 combinations, respectively. A comparison of the experimental 3p 4D and 3d 4F lifetimes in N III, O IV and F V with recently published theoretical results shows an overall agreement but also some surprising discrepancies.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
