4.5 Article

Results from a search for the 0 vββ-decay of 130Te

Journal

PHYSICAL REVIEW C
Volume 78, Issue 3, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.78.035502

Keywords

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Funding

  1. Instituto Nazionale di Fisica Nucleare (INFN)
  2. Commission of the European Community [HPRN-CT-2002-00322]
  3. U. S. Department of Energy [DE-AC03-76-SF00098, DOE W-7405-Eng-48]
  4. National Science Foundation [PHY-0139294, PHY-0500337]
  5. Division Of Physics
  6. Direct For Mathematical & Physical Scien [0758544] Funding Source: National Science Foundation

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A detailed description of the CUORICINO Te-130 neutrinoless double-beta (0 v beta beta) decay experiment is given and recent results are reported. CUORICINO is an array of 62 tellurium oxide (TeO2) bolometers with an active mass of 40.7 kg. It is cooled to similar to 8-10 mK by a dilution refrigerator shielded from environmental radioactivity and eneergetic neutrons. It is running in the Laboratori Nazionali del Gran Sasso (LNGS) in Assergi, Italy. These data represent an exposure of 11.83 kg yr or 91 mole-years of Te-130. No evidence for 0 v beta beta-decay was observed and a limit of T-1/2(0v)(Te-130) >= 3.1 x 10(24) y (90% CL) is set. This corresponds to an upper limit on the effective mass, (m(v)), between 0.19 and 0.68 eV when analyzed with the many published nuclear structure calculations. In the context of these nuclear models, the values fall within the range corresponding to the claim of evidence of 0v beta beta-decay by H.V. Klapdor-kleingrothaus et al. The experiment continues to acquire data.

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