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Investigation of double-beta decay with the NEMO-3 detector

Abstract

The double-beta-decay experiment NEMO-3 has been taking data since February 2003. The aim of this experiment is to search for neutrinoless (0 νββ) decay and investigate two neutrino doublebeta decay in seven different isotopically enriched samples (100Mo, 82Se, 48Ca, 96Zr, 116Cd, 130Te, and 150Nd). After analysis of the data corresponding to 3.75 yr, no evidence for 0 νββ decay in the 100Mo and 82Se samples was found. The half-life limits at the 90% C.L. are 1.1 × 1024 and 3.6 × 1023 yr, respectively. Additionally for 0 νββ decay the following limits at the 90% C.L. were obtained, >1.3 × 1022 yr for 48Ca, >9.2 × 1021 yr for 96Zr, and >1.8 × 1022 yr for 150Nd. The 2 νββ decay half-life values were precisely measured for all investigated isotopes.

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Correspondence to A. S. Barabash.

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Barabash, A.S., Brudanin, V.B. & NEMO Collaboration. Investigation of double-beta decay with the NEMO-3 detector. Phys. Atom. Nuclei 74, 312–317 (2011). https://doi.org/10.1134/S1063778811020062

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  • DOI: https://doi.org/10.1134/S1063778811020062

Keywords

  • Radon
  • Atomic Nucleus
  • Neutrino Mass
  • Nuclear Matrix Element
  • Wire Chamber