Direct evidence for two-neutrino double-beta decay in Se82

S. R. Elliott, A. A. Hahn, and M. K. Moe
Phys. Rev. Lett. 59, 2020 – Published 2 November 1987
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Abstract

The two-neutrino mode of double-beta decay in Se82 has been observed in a time-projection chamber at a half-life of (1.10.3+0.81020 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.

  • Received 31 August 1987

DOI:https://doi.org/10.1103/PhysRevLett.59.2020

©1987 American Physical Society

Authors & Affiliations

S. R. Elliott, A. A. Hahn, and M. K. Moe

  • Department of Physics, University of California, Irvine, California 92717

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Vol. 59, Iss. 18 — 2 November 1987

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