Direct evidence for two-neutrino double-beta decay in Se82
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ID: 267315
1987
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Abstract
The two-neutrino mode of double-beta decay in $^{82}\mathrm{Se}$ has been observed in a time-projection chamber at a half-life of ${(1.1}_{\mathrm{\ensuremath{-}}0.3}^{+0.8}$)\ifmmode\times\else\texttimes\fi{}${10}^{20}$ yr (68% confidence level). This result from direct counting confirms the earlier geochemical measurements and helps provide a standard by which to test the double-beta-decay matrix elements of nuclear theory. It is the rarest natural decay process ever observed directly in the laboratory.
| Reference Key |
elliott1987physicaldirect
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|---|---|
| Authors | S. R. Elliott;A. A. Hahn;M. K. Moe; |
| Journal | physical review letters |
| Year | 1987 |
| DOI |
doi:10.1103/PhysRevLett.59.2020
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