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HK: Fachverband Physik der Hadronen und Kerne
HK 23: Invited Talks III
HK 23.1: Invited Talk
Wednesday, March 22, 2023, 11:00–11:30, HSZ/0002
High-Precision Laser Spectroscopy of C4+ for an All-Optical Determination of the Nuclear Charge Radius — •Phillip Imgram1, Kristian König1, Bernhard Maaß2, Patrick Müller1, and Wilfried Nörtershäuser1 — 1Institut für Kernphysik, TU Darmstadt, Germany — 2Argonne National Laboratory, Chicago, IL, USA
Nuclear charge radii of radioactive isotopes are typically referenced to a stable nucleus in the isotopic chain through an atomic isotope shift measurement. In some cases, this can limit the uncertainty of the obtained charge radii of radioactive nuclei to the uncertainty of the reference measurements from elastic electron scattering or muonic atom spectroscopy. To overcome this limit in light mass nuclei like 10,11B, an all-optical approach for the charge radius determination purely from laser spectroscopy measurements and non-relativistic QED calculations was tested with the well-known nucleus of 12C through laser excitation of helium-like 12C4+ from the metastable 2 3S1 state with a lifetime of 21 ms to the 2 3PJ states. The high-precision collinear laser spectroscopy of 12C4+ has been performed at the Collinear Apparatus for Laser Spectroscopy and Applied Physics (COALA) at the Institute of Nuclear Physics of TU Darmstadt. This contribution will give an overview of the project and present the measured transition frequencies along with the extracted all-optical nuclear charge radius of 12C. This project is supported by DFG (Project-ID 279384907 - SFB 1245).