Atomic Masses of Tritium and Helium-3

Jan 7, 2015
5 pages
Published in:
  • Phys.Rev.Lett. 114 (2015) 1, 013003
  • Published: Jan 7, 2015

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Abstract: (APS)

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 He3 and T. Our results are M[He3]=3.01602932243(19)u and M[T]=3.01604928178(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 β decay to be (M[T]M[He3])c2=18592.01(7)eV. This allows an improved test of systematics in measurements of tritium β decay that set limits on neutrino mass.

  • 32.10.Bi
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  • 23.40.-s