Mass Difference of Tritium and Helium-3

被引：8

作者：

Restrepo, Moises Medina ^{[1
]}

Myers, Edmund G. ^{[1
]}

机构：

[1] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 131卷 / 24期

基金：

美国国家科学基金会;

关键词：

PENNING TRAP; 2; IONS;

D O I：

10.1103/PhysRevLett.131.243002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

From cyclotron frequency ratios of HD+/He-3(+), HD+/T+, and T+/He-3(+) we measure the mass difference between atoms of Tand He-3 to be 1.995 940 8 (23) x 10-5 u, corresponding to a Q value for tritium beta decay of 18 592.071(22) eV. This enables an improved check on systematics of beta decay experiments that set limits on neutrino mass. Using the HD+ mass calculated from the atomic masses of the proton and deuteron as given by Rau et al. [Nature 585, 43 (2020)], we also obtain improved atomic masses for the triton and helion (considered to be fundamental constants), namely, 3.015 500 716 066 (39) and 3.014 932 246 957 (38) u.

引用

页数：6

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