Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 30: Precision Spectroscopy of Atoms and Ions IV (joint session A/Q)
A 30.1: Talk
Thursday, March 14, 2024, 14:30–14:45, HS 1098
Laser-spectroscopic determination of the nuclear charge radius of 13C — •Patrick Müller1, Emily Burbach1, Phillip Imgram2, Kristian König1, Wilfried Nörtershäuser1, and Julien Spahn1 — 1Institut für Kernphysik, TU Darmstadt, 64289 Darmstadt, Germany — 2Instituut voor Kern- en Stralingsfysica, KU Leuven, 3001 Leuven, Belgium
Collinear laser spectroscopy (CLS) has proven to be a powerful method to benchmark nuclear and atomic structure calculations. Light heliumlike systems are ideal test cases for both worlds as they exhibit a greatly varying nuclear structure and are accessible for high-precision ab-initio calculations. In an ongoing effort, it is planned to determine absolute and differential nuclear charge radii, RC and δ⟨ r2⟩, of the light elements Be to N by purely using CLS and ab-initio nonrelativistic quantum electrodynamics calculations in the helium-like ions. As a first step, the 1s2s 3S1→ 1s2p 3PJ transitions in 12,13C4+ were determined using the Collinear Apparatus for Laser Spectroscopy and Applied Science (COALA) at the Technical University of Darmstadt.
We present results for δ⟨ r2⟩12,13 and the hyperfine structure of 13C4+, which is modulated by significant hyperfine-induced mixing, and compare them to ab-initio nuclear and atomic structure calculations. In both cases, our model independent results can be used to improve theory and help quantifying theoretical uncertainties. A comparison to the model-dependent results from elastic electron scattering and muonic atom spectroscopy will help to improve these experimental methods.
This project is supported by DFG (Project-ID 279384907 - SFB 1245).
Keywords: Highly charged ions; Nuclear structure; Atomic structure; Laser spectroscopy; Accelerators