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Suggestive evidence for the two neutrino double beta decay of Ge-76

Authors
  • Miley, H.S.
  • Brodzinski, R.L.
  • Reeves, J.H.
  • Avignone, F.T.
  • Collar, J.I.
Publication Date
Jan 01, 1990
Identifiers
DOI: 10.1103/PhysRevLett.65.3092
OAI: oai:inspirehep.net:306071
Source
INSPIRE-HEP
Keywords
License
Unknown
External links

Abstract

A dramatic reduction in background was achieved in the latest Pacific Northwest Laboratory–University of South Carolina germanium detectors. Two 1.05-kg natural-isotopic-abundance detectors were operated for 1.92 kg yr. The residual spectrum, after straightforward corrections, has a significant region resembling the theoretical spectrum of the two-neutrino ββ decay of Ge76. A fit to the data yields T1/22ν(76Ge)=(1.1−0.3+0.6)×1021 yr at the 95% C.L., which agrees with shell-model predictions.

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