Observation of Two-Neutrino Double-Beta Decay in [superscript 136]Xe with the EXO-200 Detector
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Ackerman-2011-Observation of Two-Neutrino Double-Beta Decay in.pdf
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Author(s)
Waldman, Samuel J.
Alternative Title
Observation of Two-Neutrino Double-Beta Decay in 136Xe with the EXO-200 Detector
Date Issued
November 2011
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Ackerman, N. et al. “Observation of Two-Neutrino Double-Beta Decay in ^{136}Xe with the EXO-200 Detector.” Physical Review Letters 107.21 (2011): Web. 22 Mar. 2012. © 2011 American Physical Society
Version
Final published version
Abstract
We report the observation of two-neutrino double-beta decay in [superscript 136]Xe with T[subscript 1/2]=2.11±0.04(stat)±0.21(syst)×10[superscript 21] yr. This second-order process, predicted by the standard model, has been observed for several nuclei but not for [superscript 136]Xe. The observed decay rate provides new input to matrix element calculations and to the search for the more interesting neutrinoless double-beta decay, the most sensitive probe for the existence of Majorana particles and the measurement of the neutrino mass scale.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.107.212501
