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Title: Status of LUMINEU program to search for neutrinoless double beta decay of {sup 100}Mo with cryogenic ZnMoO{sub 4} scintillating bolometers

The LUMTNEU program aims at performing a pilot experiment on 0ν2β decay of {sup 100}Mo using radiopure ZnMoO{sub 4} crystals enriched in {sup 100}Mo operated as cryogenic scintillating bolometers. Large volume ZnMoO{sub 4} crystal scintillators (∼ 0.3 kg) were developed and tested showing high performance in terms of radiopurity, energy resolution and α/β particle discrimination capability. Zinc molybdate crystal scintillators enriched in {sup 100}Mo were grown for the first time by the low-thermal-gradient Czochralski technique with a high crystal yield and an acceptable level of enriched molybdenum irrecoverable losses. A background level of ∼ 0.5 counts/(yr keV ton) in the region of interest can be reached in a large detector array thanks to the excellent detectors radiopurity and particle discrimination capability, suppression of randomly coinciding events by pulse-shape analysis, and anticoincidence cut. These results pave the way to future sensitive searches based on the LUMTNEU technology, capable of approachingand exploring the inverted hierarchy region of the neutrino mass pattern.
Authors:
; ; ;  [1] ; ; ; ; ; ; ; ; ; ; ;  [2] ; ; ;  [3] ; ;  [4] more »; « less
  1. Institute for Nuclear Research, MSP 03680 Kyiv (Ukraine)
  2. Centre de Sciences Nucléaires et de Sciences de la Matière, CNRS/IN2P3, Université Paris-Sud, 91405 Orsay (France)
  3. IAS, CNRS, Université Paris-Sud, 91405 Orsay (France)
  4. CEA, Centre d’Etudes Saclay, Orphée, 91191 Gif-Sur-Yvette Cedex (France)
Publication Date:
OSTI Identifier:
22492662
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; ANTICOINCIDENCE; BOLOMETERS; CRYSTALS; DOUBLE BETA DECAY; ENERGY RESOLUTION; MOLYBDATES; MOLYBDENUM; MOLYBDENUM 100; PARTICLE DISCRIMINATION; PHOSPHORS; PULSE SHAPERS; TEMPERATURE GRADIENTS; ZINC COMPOUNDS