Measurement of the half-life of the two-neutrino double beta decay of Ge-76 with the Gerda experiment

Abstract

The primary goal of the GERmanium Detector Array (Gerda) experiment at the Laboratori Nazionali del Gran Sasso of INFN is the search for the neutrinoless double beta decay of Ge-76. High-purity germanium detectors made from material enriched in Ge-76 are operated directly immersed in liquid argon, allowing for a substantial reduction of the background with respect to predecessor experiments. The first 5.04 kg yr of data collected in Phase I of the experiment have been analyzed to measure the half-life of the neutrino-accompanied double beta decay of Ge-76. The observed spectrum in the energy range between 600 and 1800 keV is dominated by the double beta decay of Ge-76. The half-life extracted from Gerda data is T(1/2) = (1.84 +0.14 -0.10) 10^{21} yr.

arXiv comment14 pages, 2 figures, submitted to J. Phys. G: Nucl. Part. Phys

References in corpus (26)

• Double Beta Decay, Majorana Neutrinos, and Neutrino Mass
• Latest Results from the Heidelberg-Moscow Double Beta Decay Experiment
• Theory of neutrinoless double beta decay
• Phase space factors for double-$\beta$ decay
• Neutrino-less Double Beta Decay and Particle Physics
• Anatomy of nuclear matrix elements for neutrinoless double-beta decay
• Erratum: Assessment of uncertainties in QRPA $0\nu \beta \beta$-decay nuclear matrix elements [Nucl. Phys. A 766, 107 (2006)]
• BAT - The Bayesian Analysis Toolkit
• The GERDA experiment for the search of 0νββ decay in ^{76}Ge
• The event generator DECAY4 for simulation of double beta processes and decay of radioactive nuclei
• Measurement of the double-βdecay half-life of ^{136}Xe with the KamLAND-Zen experiment
• Precise half-life values for two neutrino double beta decay
• Observation of Two-Neutrino Double-Beta Decay in Xe-136 with EXO-200
• Neutrinoless double-beta decay. A brief review
• \textsc{MaGe} - a {\sc Geant4}-based Monte Carlo Application Framework for Low-background Germanium Experiments
• Shell Model description of the beta beta decay of 136Xe
• Measurement of the Double Beta Decay Half-life of 150-Nd and Search for Neutrinoless Decay Modes with the NEMO-3 Detector
• Majorons Without Majorana Masses and Neutrinoless Double Beta Decay
• Limits on different Majoron decay modes of ${}^{100}$Mo and ${}^{82}$Se for neutrinoless double beta decays in the NEMO-3 experiment
• Review on Double Beta Decay Experiments and Comparison with Theory
• Relation between the $0\nu \beta \beta$ and $2\nu \beta \beta$ nuclear matrix elements revisited
• The Neutrinoless Double Beta Decay: The Case for Germanium Detectors
• Signal discovery in sparse spectra: a Bayesian analysis
• p-Values for Model Evaluation
• Off-line data processing and analysis for the GERDA experiment
• GELATIO: a general framework for modular digital analysis of high-purity Ge detector signals

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• Systematic Law for Half-lives of Double $\beta$-decay with Two Neutrinos
• Final Results of GERDA on the Two-Neutrino Double-$\beta$ Decay Half-Life of ${}^{76}$Ge
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• Ge Detectors and $0\nu \beta \beta$: The Search for Double Beta Decay with Germanium Detectors: Past, Present and Future
• The first result on 76Ge neutrinoless double beta decay from CDEX-1 experiment
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• Fast Neutron Detection with a Segmented Spectrometer
• Results on neutrinoless double beta decay from GERDA Phase I
• Neutrino Masses
• Development and Characterization of a High Sensitivity Segmented Fast Neutron Spectrometer (FaNS-2)
• Measuring Double-Electron Capture with Liquid Xenon Experiments
• Monte Carlo Studies and Optimization for the Calibration System of the GERDA Experiment
• Standard Electroweak Interactions in Gravitational Theory with Chameleon Field and Torsion
• Neutrinoless Double Beta Decay Experiments
• The search for 0nbb decay with the GERDA experiment: status and prospects
• Imperfect World of $\beta \beta$-decay Nuclear Data Sets?
• Half-lives of Double ${\beta }^{+}$-decay with Two Neutrinos
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