Journal
PHYSICAL REVIEW LETTERS
Volume 114, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.013003
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Funding
- NSF [PHY-0968889]
- NIST Precision Measurement Grant Program
- Division Of Physics
- Direct For Mathematical & Physical Scien [1403725, 968889] Funding Source: National Science Foundation
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By measuring the cyclotron frequency ratios of He-3(+) to HD+ and T+ to HD+, and using HD+ as a mass reference, we obtain new atomic masses for He-3 and T. Our results are M[He-3] = 3.016 029 322 43(19) u and M[T] = 3.016 049 281 78(19) u, where the uncertainty includes an uncertainty of 0.12 nu in the mass reference. Allowing for cancellation of common systematic errors, we find the Q value for tritium beta decay to be (M[T] - M[He-3])c(2) = 18 592.01(7) eV. This allows an improved test of systematics in measurements of tritium beta decay that set limits on neutrino mass.
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