Erlangen 2018 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 1: Precision Mass Spectrometry 1

MS 1.3: Vortrag

Montag, 5. März 2018, 11:15–11:30, R 1.020

Precision Measurements of Neon Isotopes at THe-Trap — •Tom Segal, Martin Höcker, Jochen Ketter, Marc Schuh, Sebastian Streubel, and Klaus Blaum — Max-Planck-Institut für Kernphysik

THe-Trap is a precision Penning-trap mass spectrometer [1] at the Max-Planck-Institut für Kernphysik (MPIK) in Heidelberg. It aims to solve the 4-σ discrepancy in the mass measurements of helium-3 [2,3] by measuring its mass with a relative uncertainty of about 10⁻¹⁰. Left unresolved, the discrepancy increases the uncertainties of the hydrogen and deuterium masses, as well as the values of physical constants such as h, k_B and N_A. A new gas injection system was developed in preparation for the helium measurement. To test it, neon gas was successfully injected into the traps region and ionized by a field emission point. The produced ions were trapped and their cyclotron frequency measured. The measurement process will be presented, as well as preliminary mass results for ²⁰Ne, ²²Ne and future plans.

[1] S. Streubel et al., Applied Physics B: Lasers and Optics (2014), 114(1-2), 137-145

[2] R.S. Van Dyck et al., Metrologia (2015), Volume 52, Number 2

[3] E.G. Meyers et al., Phys. Rev. Lett (2015), 144,013003