Ultralow-background study of neutrinoless double. beta. decay of /sup 76/Ge; new limit on the Majorana mass of. nu. /sub e/
Journal Article
·
· Phys. Rev. Lett.; (United States)
A lower limit of 1.16 x 10/sup 23/ yr (1sigma) is reported for the half-life of no-neutrino ..beta../sup -/..beta../sup -/ decay of /sup 76/Ge which results from 3763 h of counting with an ultralow-background, 135-cm/sup 3/ prototype detector located 1438 m underground. A limit of 1.7 x 10/sup 23/ yr (1sigma) results from the best combination of our data with that from other experiments. Straightforward application of shell-model matrix elements to this limit implies that <3.2 eV (1sigma).
- Research Organization:
- Pacific Northwest Laboratory, Richland, Washington 99352 and University of South Carolina, Columbia, South Carolina 29208 XPNL-USC Collaboration)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 5599006
- Journal Information:
- Phys. Rev. Lett.; (United States), Vol. 54:21
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELECTRON NEUTRINOS
MASS
GERMANIUM 76
BETA-MINUS DECAY
BREMSSTRAHLUNG
CHIRAL SYMMETRY
CRYOSTATS
ENERGY SPECTRA
GAMMA RADIATION
GRAND UNIFIED THEORY
HALF-LIFE
LIMITING VALUES
MATRIX ELEMENTS
MONTE CARLO METHOD
SHELL MODELS
SYMMETRY BREAKING
BETA DECAY
CONTROL EQUIPMENT
DECAY
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EQUIPMENT
EVEN-EVEN NUCLEI
FERMIONS
FIELD THEORIES
GERMANIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
NEUTRINOS
NUCLEAR MODELS
NUCLEI
PARTICLE MODELS
RADIATIONS
SPECTRA
STABLE ISOTOPES
SYMMETRY
THERMOSTATS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
651622* - Nuclear Properties & Reactions
A=59-89
Experimental- Radioactive Decay- (-1987)
645102 - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELECTRON NEUTRINOS
MASS
GERMANIUM 76
BETA-MINUS DECAY
BREMSSTRAHLUNG
CHIRAL SYMMETRY
CRYOSTATS
ENERGY SPECTRA
GAMMA RADIATION
GRAND UNIFIED THEORY
HALF-LIFE
LIMITING VALUES
MATRIX ELEMENTS
MONTE CARLO METHOD
SHELL MODELS
SYMMETRY BREAKING
BETA DECAY
CONTROL EQUIPMENT
DECAY
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EQUIPMENT
EVEN-EVEN NUCLEI
FERMIONS
FIELD THEORIES
GERMANIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
NEUTRINOS
NUCLEAR MODELS
NUCLEI
PARTICLE MODELS
RADIATIONS
SPECTRA
STABLE ISOTOPES
SYMMETRY
THERMOSTATS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
651622* - Nuclear Properties & Reactions
A=59-89
Experimental- Radioactive Decay- (-1987)
645102 - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties