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MS: Fachverband Massenspektrometrie
MS 1: Penning-Trap Mass Spectrometry
MS 1.7: Vortrag
Montag, 14. März 2022, 15:45–16:00, MS-H9
Towards a High-Precision Atomic Mass Measurement of the 3He and T Nuclei — •Olesia Bezrodnova1, Sangeetha Sasidharan1,2, Sascha Rau1, Wolfgang Quint2, Sven Sturm1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
The mass difference of T and 3He nuclei, measured with the highest precision, will allow an important consistency check for the systematic uncertainty of an upper limit of the m(νe) by the KATRIN project [1]. The most precise mass measurements of the lightest nuclei, including 3He nucleus, revealed considerable inconsistencies between the values reported by different experiments [2]. In order to provide an independent cross-check, LIONTRAP, a multi-Penning trap mass spectrometer, has carried out mass measurements on the proton [3], the deuteron and the HD+ molecular ion [4].
The present activities of the LIONTRAP group aim at ultra-precise mass measurements of the 3He and T nuclei with a relative uncertainty better than 5 ppt. In this contribution, I present the current status of the experiment, which includes the 3He source preparation for the upcoming mass measurement campaign and modifications of the experimental setup for the radioactive T source placement.
[1] M. Aker et al. Phys. Rev. Lett. 123, 221802 (2019)
[2] S. Hamzeloui et al. Phys. Rev. A 96, 060501(R) (2017)
[3] F. Heiße et al. Phys. Rev. A 100, 022518 (2019)
[4] S. Rau et al. Nature 585, 43-47 (2020)