Direct evidence for two-neutrino double-beta decay in /sup 82/Se

Journal Article · Mon Nov 02 04:00:00 EST 1987 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.59.2020· OSTI ID:5549704

Elliott, S R; Hahn, A A; Moe, M K

The two-neutrino mode of double-beta decay in /sup 82/Se has been observed in a time-projection chamber at a half-life of (1.1/sub -0.3//sup +0.8/) x 10/sup 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.

• Research Organization: Department of Physics, University of California, Irvine, California 92717
• OSTI ID: 5549704
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 59:18; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

651620* -- Nuclear Properties & Reactions
A=59-89
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
BETA-MINUS DECAY
DECAY
DOUBLE BETA DECAY
ELASTIC SCATTERING
ELEMENTARY PARTICLES
ENERGY SPECTRA
EVEN-EVEN NUCLEI
FERMIONS
GAS TRACK DETECTORS
HALF-LIFE
INTERMEDIATE MASS NUCLEI
ISOTOPES
LEPTONS
MASSLESS PARTICLES
MATRIX ELEMENTS
MEASURING INSTRUMENTS
MOELLER SCATTERING
NEUTRINOS
NUCLEI
PROBABILITY
PROJECTION SPARK CHAMBERS
RADIATION DETECTORS
SCATTERING
SELENIUM 82
SELENIUM ISOTOPES
SPARK CHAMBERS
SPECTRA
STABLE ISOTOPES