Further studies on the evidence for a 17-keV neutrino in a {sup 14}C-doped germanium detector

Journal Article · Tue Aug 01 00:00:00 EDT 1995 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.52.1028· OSTI ID:113007

Wietfeldt, F E; Norman, E B; Chan, Y D; da Cruz, M T.F.; Garcia, A; Haller, E E; Hansen, W L; Hindi, M M; Larimer, R; Lesko, K T; Luke, P N; Stokstad, R G; Sur, B; Zlimen, I ^[1]

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1. Nuclear Science Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)

We have studied the beta spectrum of {sup 14}C using a unique {sup 14}C-doped 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 {ital Q} value of {sup 14}C decay to be 155.95{plus_minus}0.07(stat.){plus_minus}0.21(sys.) keV, in disagreement with a previous precision measurement.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• DOE Contract Number: AC03-76SF00098; FG05-87ER40314
• OSTI ID: 113007
• Journal Information: Physical Review, C, Vol. 52, Issue 2; Other Information: PBD: Aug 1995
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CARBON 14
BETA SPECTRA
NEUTRINOS
MASS
GERMANIUM
ENERGY SPECTRA
STANDARD MODEL
EIGENSTATES
U-1 GROUPS
KOBAYASHI-MASKAWA MATRIX
BETA DECAY