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SYMD: SMuK Dissertation Prize 2024
SYMD 1: SMuK Dissertation Prize 2024
SYMD 1.2: Hauptvortrag
Montag, 11. März 2024, 14:45–15:15, HBR 14: HS 1
High-precision laser spectroscopy of helium-like carbon 12C4+ — •Phillip Imgram1, Kristian König2, Bernhard Maaß2, Patrick Müller2, and Wilfried Nörtershäuser2 — 1Institute for Nuclear and Radiation Physics, KU Leuven, Belgium — 2Institut für Kernphysik, TU Darmstadt, Germany
The nuclear charge radius is a key observable in nuclear structure studies. Using the Collinear Apparatus for Laser Spectroscopy and Applied Physics (COALA) at the Institute of Nuclear Physics of TU Darmstadt, an all-optical approach for the nuclear charge radius determination was tested with the well-known nucleus of 12C. Here, the nuclear charge radius of 12C was extracted purely from laser spectroscopy measurements that were combined with non-relativistic QED calculations. Laser excitation of helium-like 12C4+ started from the metastable 2 3S1 state with a lifetime of 21 ms to reach the 2 3PJ states. The precision of the corresponding transition frequencies was improved by more than 3 orders of magnitude. Furthermore, this work represents the starting point for the necessary improvement of charge radii of the light-mass nuclei and it will be the corner stone for investigations of the carbon isotope chain. This contribution will give an overview of the project, present the measured transition frequencies along with the extracted all-optical nuclear charge radius of 12C and give an outlook on upcoming measurements. This project was supported by DFG (Project-ID 279384907 - SFB 1245) and by BMBF (05P21RDFN1).
Keywords: Collinear laser spectroscopy; Nuclear Charge Radius