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MS: Fachverband Massenspektrometrie
MS 1: Penning-Trap Mass Spectrometry
MS 1.5: Vortrag
Montag, 14. März 2022, 15:15–15:30, MS-H9
Status of precision mass measurements at the LIONTRAP experiment — •Sangeetha Sasidharan1,2, Olesia Bezrodnova1, Sascha Rau1, Wolfgang Quint2, Sven Sturm1, and Klaus Blaum1 — 1MPIK, Heidelberg, Germany — 2GSI Helmholtzzentrum, Darmstadt, Germany
The LIONTRAP experiment is a high-precision mass spectrometer dedicated to light ions. The results at LIONTRAP include the atomic mass measurements of the proton [1], the deuteron and the HD+ molecular ion [2]. The deuteron mass was measured to a relative precision of 8.5 ppt [2]. Our results show an excellent agreement with values extracted from laser spectroscopy of HD+ [3] and the comparison is limited by the precision of the electron’s atomic mass. The electron mass in atomic mass units (amu) is currently extracted from the bound electron g-factor measurement of 12C5+ [4]. This could be improved in the future via a better measurement of the magnetic moment of the bound electron. 4He ion is a prime candidate for the same as it has smaller theoretical uncertainties for the g-factor due to its lower Z than 12C5+ and also has a simpler nuclear structure. Currently, we are measuring the atomic mass of 4He to support such a determination of the electron mass in amu. In this contribution, the present status of the experiment will be discussed.
[1] F. Heiße et al., Phys. Rev. A 100, 022518 (2019).
[2] S. Rau et al., Nature 585, (2020) pp. 43-47.
[3] I. V. Kortunov et al., Nature Physics, 17, (2021) pp. 569-573.
[4] S. Sturm et al., Nature 506, (2014) pp. 467-470.