Intercombination and forbidden transition rates in C- and N-like ions (O2+, F3+ and S9+) measured at a heavy-ion storage ring - art. no. 022507

Rates of an intercombination transition and several electric-dipole forbidd en transitions between the levels of the ground complex in C-Like ions of O and F and in N-like ions of S have been measured optically at a heavy-ion storage ring. The lifetime results, 1.250(13) ms for the 2s2p(3) S-5(2)0 le vel in O2+, 530(25) and 304(5) ms for the 2s(2) 2P(2) S-1(0) level in O2+ a nd F3+, respectively, and 5.20(15) and 2.10(6) ms for the 2s(2)2p(3) P-2(1/ 2,3/2)0, levels of S9+, agree with only some of the theoretical predictions , while they have a lower estimated uncertainty than all of them.