Experimental study of double beta decay modes using a CdZnTe detector array

Abstract

An array of sixteen 1 cm^3 CdZnTe semiconductor detectors was operated at the Gran Sasso Underground Laboratory (LNGS) to further investigate the feasibility of double-beta decay searches with such devices. As one of the double-beta decay experiments with the highest granularity the 4 x 4 array accumulated an overall exposure of 18 kg days. The setup and performance of the array is described. Half-life limits for various double-beta decay modes of Cd, Zn and Te isotopes are obtained. No signal has been found, but several limits beyond 10^20 years have been performed. They are an order of magnitude better than those obtained with this technology before and comparable to most other experimental approaches for the isotopes under investigation. An improved limit for the beta^+/EC decay of Te 120 is given.

6 pages, 5 figures

References in corpus (15)

• Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in the Sudbury Neutrino Observatory
• Double Beta Decay, Majorana Neutrinos, and Neutrino Mass
• Precision Measurement of Neutrino Oscillation Parameters with KamLAND
• Measurement of Neutrino Oscillation by the K2K Experiment
• Electron Energy Spectra, Fluxes, and Day-Night Asymmetries of ${}^8$B Solar Neutrinos from the 391-Day Salt Phase SNO Data Set
• Solar neutrino measurements in Super-Kamiokande-II
• Measurement of Neutrino Oscillations with the MINOS Detectors in the NuMI Beam
• Results from a search for the $0\nu \beta \beta$-decay of ${}^{130}Te$
• The event generator DECAY4 for simulation of double beta processes and decay of radioactive nuclei
• COBRA - Double beta decay searches using CdTe detectors
• Neutrino-less Double Electron Capture - a tool to research for Majorana neutrinos
• A New Limit on the Neutrinoless DBD of 130Te
• A Search for various Double Beta Decay Modes of Cd, Te and Zn Isotopes
• First results on double beta decay modes of Cd, Te and Zn isotopes with the COBRA experiment
• An Investigation into the 113-Cd Beta Decay Spectrum using a CdZnTe Array

Cited by in corpus (8)

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• The COBRA demonstrator at the LNGS underground laboratory
• Characterizing Quantum-Dot-Doped Liquid Scintillator for Applications to Neutrino Detectors
• Search for beta plus/EC double beta decay of 120Te
• Search for 2β decay of 116Cd with the help of enriched 116CdWO4 crystal scintillators