Laser Spectroscopy Of The S-2(1/2)-P-2(1/2), P-2(3/2) Transitions In Stored And Cooled Relativistic C3+Ions

The 2S1/2-2P1/2 and 2S1/2-2P3/2 transitions in Li-like carbon ions stored and cooled at a velocity of beta approximate to 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.