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Title: The COBRA experiment – Status and prospects on the search of neutrinoless double beta-decay

The Cadmium-Zinc-Telluride 0-ν Double Beta Research Apparatus (COBRA) [1] is a next-generation experiment searching for the existence of neutrinoless double beta-decay (0νββ-decay). The observation of 0νββ-decay would be an unambiguous sign for physics beyond the Standard Model such as lepton number violating processes and would prove the Majorana character of neutrinos. Furthermore, the study of 0νββ-decay could probe the absolute neutrino mass and allows for the identification of the neutrino mass hierarchy realized in nature assuming light Majorana neutrino exchange. Currently a demonstrator setup at the underground facility LNGS (Italy) built of 4×4×4 coplanar grid (CPG) detectors collects high quality low background physics data with FADC pulse shape sampling. The detectors are made of natural abundant CdZnTe (CZT), which is a commercially available room temperature semiconductor. It contains several double beta isotopes, the most promising of which is {sup 116}Cd with a Q-value of 2813.5 keV – which is well above the highest naturally occurring prominent γ-lines.
Authors:
 [1]
  1. Institute of Nuclear and Particle Physics, TU Dresden, Zellescher Weg 19, Germany stefan.zatschler@tu-dresden.de (Germany)
Publication Date:
OSTI Identifier:
22492679
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1686; Journal Issue: 1; Conference: MEDEX'15: Workshop on calculation of double-beta-decay matrix elements, Prague (Czech Republic), 9-12 Jun 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CADMIUM 116; CADMIUM TELLURIDES; DOUBLE BETA DECAY; LEPTON NUMBER; MASS; NEUTRINOS; PULSE SHAPERS; Q-VALUE; SEMICONDUCTOR MATERIALS; STANDARD MODEL; TEMPERATURE RANGE 0273-0400 K; UNDERGROUND FACILITIES; ZINC TELLURIDES