Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 71: Structure and Dynamics of Nuclei XIII
HK 71.4: Vortrag
Donnerstag, 31. März 2022, 17:00–17:15, HK-H7
First results of an all-optical nuclear charge radius determination at COALA — •Phillip Imgram1, Emily Burbach1, Bernhard Maaß2, Patrick Müller1, and Wilfried Nörtershäuser1 — 1Institut für Kernphysik, TU Darmstadt, Germany — 2Argonne National Laboratory, Chicago, IL, USA
The Collinear Apparatus for Laser Spectroscopy and Applied Physics (COALA) at the Institute of Nuclear Physics of TU Darmstadt has been designed to perform high-precision experiments on stable isotopes for high-voltage measurements, atomic physics and nuclear structure research. The recently applied upgrade with an electron-beam ion source allows us to study transitions in multiply-charged ions. Here, the focus is on light ions to determine nuclear charge radii with an all-optical approach, i.e. without referencing to charge radii determined by elastic electron scattering or transitions in muonic atoms. Therefore, the 3S1 → 3PJ transitions of He-like ions will be measured to a targeted accuracy of <1 MHz with simultaneous collinear and anticollinear laser spectroscopy. This experimental value can directly be compared with nonrelativistic QED calculations [1] that are currently being performed. This contribution will summarize the current status of the project and present first results of 12C4+ measurements. This project is supported by DFG (Project-ID 279384907 - SFB 1245) and by BMBF (05P21RDFN1).
[1] V. Patkós, Phys. Rev. A 103, 042809 (2021)