Freiburg 2024 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 1: Precision Mass Spectrometry
MS 1.2: Vortrag
Montag, 11. März 2024, 11:30–11:45, HS 3042
The Mass of 3He - the Last Missing Piece in the Light Ion Mass Puzzle — •Olesia Bezrodnova1, Sangeetha Sasidharan1,2, Wolfgang Quint2, Sven Sturm1, and Klaus Blaum1 — 1Max Planck Institute for Nuclear Physics, Heidelberg, Germany — 2GSI Helmholtzzentrum, Darmstadt, Germany
The masses of light nuclei form a network of parameters used in fundamental physics. m(T)−m(3He), for example, must be known with the highest precision to check for systematic uncertainties in experiments such as KATRIN [1] or Project 8 [2], which study T β-decay to set a limit on the νe mass. A Penning-trap measurement involving the bound electron g-factor can improve the precision of me if the mass of the reference nucleus, 4He, is known with sufficient precision.
Penning trap mass measurements of the lightest nuclei have revealed considerable inconsistencies between the values reported by different experiments. To restore confidence in the literature values, the mass spectrometer LIONTRAP has measured the masses of the proton [3], the deuteron, the HD+ molecular ion [4], and most recently, 4He [5]. This contribution presents the preliminary results of the ongoing 3He mass measurement campaign, aimed at resolving the discrepancy of literature values known as the “Light Ion Mass Puzzle”.
[1] M. Aker et al., Nat. Phys. 18, 160-166 (2022)
[2] Project 8 Collaboration, Phys. Rev. Lett. 131, 102502 (2023)
[3] F. Heiße et al., Phys. Rev. A 100, 022518 (2019)
[4] S. Rau et al., Nature 585, 43-47 (2020)
[5] S. Sasidharan et al., Phys. Rev. Lett. 131, 093201 (2023)
Keywords: Penning Trap; Precision Mass Spectrometry; Neutrino physics; Light nuclei