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Progress in High-Precision Mass Measurements of Light Ions
Version 1
: Received: 21 December 2023 / Approved: 21 December 2023 / Online: 22 December 2023 (09:13:14 CET)
A peer-reviewed article of this Preprint also exists.
Myers, E.G. Progress in High-Precision Mass Measurements of Light Ions. Atoms 2024, 12, 8. Myers, E.G. Progress in High-Precision Mass Measurements of Light Ions. Atoms 2024, 12, 8.
Abstract
Significant advances in Penning trap measurements of atomic masses and mass ratios of the proton, deuteron, triton, helion, and alpha-particle have occurred in the last five years. These include a measurement of the mass of the deuteron against 12C with 8.5 x 10-12 fractional uncertainty; resolution of vibrational levels of H2+ as mass and the application of a simultaneous measurement technique to the H2+/D+ cyclotron frequency ratio, yielding a deuteron-proton mass ratio at 5 x 10-12; new measurements of HD+/3He+, HD+/T+ and T+/3He+ leading to a tritium beta-decay Q-value with an uncertainty of 22 meV, and atomic masses of the helion and triton at 13 x 10-12; and a new measurement of the mass of the alpha-particle against 12C at 12 x 10-12. Some of these results are in strong disagreement with previous literature values. Their impact in determining a precise proton/electron mass ratio and electron atomic mass from spectroscopy of the HD+ molecular ion is also discussed.
Keywords
atomic mass; fundamental constants; precision measurement; Penning trap
Subject
Physical Sciences, Atomic and Molecular Physics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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