M1 transition rates from electron beam ion trap and heavy-ion storage ring

摘要

The transition probability of the magnetic dipole (M1) transition 2s~22p ~2P° J = 1/2 to J' = 3/2 (λ = 574.19 nm) in the B-like ion C1~(12+) has been measured using two different light sources, the Heidelberg heavy-ion storage ring TSR and the Livermore electron beam ion trap EBIT-I. Our results for the atomic level lifetime are (21.2 +- 0.6) ms from the heavy-ion storage ring and (21.0 +-0.5) ms from the electron beam ion trap. Particular attention has been paid to systematic errors, using these measurements as well as recent measurements on Fe~(10+) and Fe~(13+) ions as examples.