Gießen 2024 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 75: Invited Talks IV
HK 75.3: Hauptvortrag
Freitag, 15. März 2024, 12:00–12:30, HBR 14: HS 1
High-precision mass measurements of light ion species — •Sangeetha Sasidharan1,2, Olesia Bezrodnova1, Wolfgang Quint2, Sven Sturm1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2GSI Helmholtzzentrum, Darmstadt, Germany
The properties of simple atomic nuclei, like the proton, deuteron, helion, and alpha particle, along with the electron, are cornerstones in understanding fundamental physics. These light ion systems allow precise atomic structure calculations, thus enabling tests of fundamental theories such as QED. Accurate calculation of the predictions requires precise values of fundamental physical constants, which are often connected to the masses of light ions. For example, in hydrogen spectroscopy, the proton’s mass impacts the value of the Rydberg constant. The electron’s atomic mass could be improved by accurately measuring the bound electron g-factor in 4He+. The highly precise atomic mass of 4He+ is instrumental in achieving this objective. Furthermore, a mass difference measurement of 3He and T will provide a crosscheck of the systematics in the electron anti-neutrino mass determination with the KATRIN experiment. Many world-leading experiments have measured these masses, but inconsistencies are observed among their results, known as the "Light Ion mass puzzle". Improved measurements of the light ion masses will help clarify this puzzle. In this talk, I will present the recent highlights and results of LIONTRAP (Light ION TRAP), a Penning trap setup dedicated to mass measurements of light ions with a relative precision of 10 parts-per-trillion and better.
Keywords: Mass spectrometry; Penning trap; Light ions; High-precision measurement; Fundamental physics