On the Q -value of the tritium β-decay
- 1 May 2006
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 74 (3) , 404-410
- https://doi.org/10.1209/epl/i2005-10559-2
Abstract
We report here the atomic masses of 3H and 3He determined by using the Penning trap mass spectrometer Smiletrap. The measurements are based on cyclotron frequency determinations of 3H1+ and 3He1+ using H2+ ions as mass reference. The mass values for 3H and 3He are 3.016 049 278 7(25) u and 3.016 029 321 7(26) u, respectively. From these masses a new Q-value of the tritium β-decay was derived resulting in 18.589 8(12) keV, being the most accurate value at present. The Q-value of the tritium β-decay is related to the possible rest mass of the electron antineutrino.Keywords
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