Suggestive evidence for the two-neutrino double-. beta. decay of sup 76 Ge

Journal Article · Mon Dec 17 04:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.3092· OSTI ID:6043654

Miley, H S; Brodzinski, R L; Collar, J I; Reeves, J H ^[1]

---

1. Pacific Northwest Laboratory, Richland, WA (USA) Department of Physics and Astronomy, University of South Carolina, Columbia, SC (USA)

A dramatic reduction in background was achieved in the latest Pacific Northwest Laboratory--University of South Carolina germanium detectors. Two 1.05-kg natural-isotopic-abundance detectors were operated for 1.92 kg yr. The residual spectrum, after straightforward corrections, has a significant region resembling the theoretical spectrum of the two-neutrino {beta}{beta} decay of {sup 76}Ge. A fit to the data yields {ital T}{sub 1/2}{sup 2{nu}}({sup 76}Ge)=(1.1{sub {minus}0.3}{sup +0.6}){times}10{sup 21} yr at the 95% C.L., which agrees with shell-model predictions.

• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6043654
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:26; ISSN PRLTA; ISSN 0031-9007
• 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
DATA
DECAY
DOUBLE BETA DECAY
ELECTRON SPECTRA
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
FERMIONS
GERMANIUM 76
GERMANIUM ISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
LEPTONS
LIFETIME
MASSLESS PARTICLES
MEV RANGE
MEV RANGE 01-10
NEUTRINOS
NUCLEAR DECAY
NUCLEI
NUMERICAL DATA
SPECTRA
STABLE ISOTOPES