Further studies on the evidence for a 17-keV neutrino in a doped14 germanium detector

F. E. Wietfeldt, E. B. Norman, Y. D. Chan, M. T. F. da Cruz, A. García, E. E. Haller, W. L. Hansen, M. M. Hindi, R.-M. Larimer, K. T. Lesko, P. N. Luke, R. G. Stokstad, B. Sur, and I. Žlimen
Phys. Rev. C 52, 1028 – Published 1 August 1995
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Abstract

We have studied the beta spectrum of C14 using a unique doped14 germanium detector. In 1991 an initial report was made of a distortion in the spectrum that could be explained by the emission of a 17-keV neutrino in approximately 1% of the decays. Further tests have shown that the observed distortion was most likely caused by systematic effects related to the detector’s active guard ring. A new measurement with a smaller data sample shows no sign of this distortion. In addition, we find the Q value of C14 decay to be 155.95±0.07(stat.)±0.21(sys.) keV, in disagreement with a previous precision measurement.

  • Received 24 February 1995

DOI:https://doi.org/10.1103/PhysRevC.52.1028

©1995 American Physical Society

Authors & Affiliations

F. E. Wietfeldt, E. B. Norman, Y. D. Chan, M. T. F. da Cruz, A. García, E. E. Haller, W. L. Hansen, M. M. Hindi, R.-M. Larimer, K. T. Lesko, P. N. Luke, R. G. Stokstad, B. Sur, and I. Žlimen

  • Nuclear Science Division, Lawrence Berkeley Laboratory, Berkeley, California 94720
  • Physics Department, University of California, Berkeley, California 94720
  • Physics Institute, University of São Paulo, São Paulo, Brazil
  • Physics Department, University of Notre Dame, Notre Dame, Indiana 46556
  • Engineering Division, Lawrence Berkeley Laboratory, Berkeley, California 94720
  • Department of Materials Science and Mineral Engineering, University of California, Berkeley, California 94720
  • Physics Department, Tennessee Technological University, Cookeville, Tennessee 38505

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Vol. 52, Iss. 2 — August 1995

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