Energy levels and radiative rates in Co XI

The General purpose Relativistic Atomic Structure Package GRASP and the Flexible Atomic Code FAC have been adopted for the calculations of energy levels and radiative rates. Energies for the lowest 287 levels of Co XI, including those among the (1s^2^2s^2^2p^6^) 3s^2^3p^5^, 3s3p^6^, 3s^2^3p^4^3d, 3s3p^5^3d, 3s^2^3p^3^3d^2^, and 3s^2^3p^4^4s configurations, are reported.

Additionally, radiative rates and oscillator strengths are reported for all electric dipole (E1) transitions with f>=10^-5^ among these levels, and similar results for magnetic dipole (M1), electric quadrupole (E2), and magnetic quadrupole (M2) transitions are reported only for those with f>=10^-8^. Comparisons are made with the available results in the literature, and the accuracy of the present data is assessed. Finally, lifetimes for all excited levels are also listed, although measurements are presently available for only one of these.