M1/E2 transition rates in Fe x through Fe XIII measured at a heavy-ion storage ring

摘要

The rates of several electric-dipole forbidden decays of 3p and 3d levels in Cl-, S-, P- and Si-like ions of Fe have been measured optically at a heavy-ion storage ring. In several cases, more than one decay contributes to a given decay curve, which complicates the analysis. The lifetime results, with a precision range from 0.6 to 20%, compare well with some theoretical predictions, but are more precise. They are also more precise than some experimental data from an electrostatic ion trap.