Laser Cooling and Spectroscopy of Relativistic C 3+ Beams at the ESR

Schramm, U.; Bußmann, Michael; Habs, D.; Steck, M.; Kühl, T.; Beckerts, K.; Béller, P.; Franzke, B.; Nolden, F.; Saathoff, G.; Reinhardt, S.; Karpuk, S.

doi:10.1007/3-540-30926-8_22

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“… 7 or 8 ), of high importance for the astrophysical community where they are used for diagnostics of hot plasmas in the interstellar medium and stellar atmospheres 9 . The wavelengths of the two transitions were already determined in a previous laser-cooling experiment at the ESR 10 , but were in conflict with earlier results from plasma spectroscopy 11 and from interferometric measurements 9 . In this new measurement special emphasis is therefore placed on a careful calibration of all experimental components and a thorough analysis of the systematic uncertainties.…”

Section: Introductioncontrasting

confidence: 72%

“…The wavelengths determined for the two transitions are in good agreement with the experimental results obtained from interferometry 9 and plasma spectroscopy 11 and, within the uncertainties, also with the given theoretical predictions. It was possible to improve the precision with respect to the previous ESR measurement 10 by about a factor of three.…”

Section: Resonance Analysismentioning

confidence: 99%

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Laser spectroscopy of the $$^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{1}/2}$$, $$^2{\mathrm{P}}_{3/2}$$ transitions in stored and cooled relativistic C3+ ions

Winzen

Hannen

Bußmann

et al. 2021

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The $$^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{1}/2}$$ 2 S 1 / 2 - 2 P 1 / 2 and $$^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{3}/2}$$ 2 S 1 / 2 - 2 P 3 / 2 transitions in Li-like carbon ions stored and cooled at a velocity of $$\beta \approx 0.47$$ 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.

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