Laser spectroscopy of the $^2S_{1/2} - ^2P_{1/2}$, $^2P_{3/2}$ transitions in stored and cooled relativistic C$^{3+}$ ions

• Main Authors: Winzen, D, Hannen, V, Bussmann, M, Buß, A, Egelkamp, C, Eidam, L, Huang, Z, Kiefer, D, Klammes, S, Kühl, T, Loeser, M, Ma, X, Nörtershäuser, W, Ortjohann, H. -W, Sánchez, R, Siebold, M, Stöhlker, T, Ullmann, J, Vollbrecht, J, Walther, T, Wang, H, Weinheimer, C, Winters, D. F. A
• Format: Journal Article
• Language: English
• Published: 27.10.2020
• Subjects: Physics - Atomic Physics
• DOI: 10.48550/arxiv.2010.14196

Scientific Reports 11 (2021) 9370 The $^2S_{1/2} - ^2P_{1/2}$ and $^2S_{1/2} - ^2P_{3/2}$ transitions in Li-like carbon ions stored and cooled at a velocity of $\beta \approx 0.47$ 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.