The ²S₁/₂-²P₁/₂ and ²S₁/₂-²P₃/₂ transitions in Li-like carbon ions stored and cooled at a velocity of β≈0.47 in the experimental storage ring (ESR) at the GSI Helmholtz Centre in Darmstadt have been investigated in a laser spectroscopy experiment. Resonance wavelengths were obtained using a new continuous-wave UV laser system and a novel extreme UV (XUV) detection system to detect forward emitted fluorescence photons. The results obtained for the two transitions are compared to existing experimental and theoretical data. A discrepancy found in an earlier laser spectroscopy measurement at the ESR with results from plasma spectroscopy and interferometry has been resolved and agreement between experiment and theory is confirmed.
The original online version of this Article was revised: The original PDF version of this Article contained a typographical error in the title of the paper, where “C³⁺” was incorrectly given as “C₃₊”.
