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A massive neutrino in nuclear beta decay

Conference · · AIP Conference Proceedings (American Institute of Physics); (United States)
OSTI ID:5540199
;  [1];  [2];  [1];  [3]; ; ; ;  [1];  [4];  [5]
  1. Nuclear Science Division, Lawrence Berkeley Laboratory, Berkeley, California (United States)
  2. Nuclear Science Division, Lawrence Berkeley Laboratory, Berkeley, California (United States) Physics Institute, University of Sao Paulo, Sao Paulo (Brazil)
  3. Nuclear Science Division, Lawrence Berkeley Laboratory, Berkeley, California (United States) Physics Department, Tennessee Technological University, Cookeville, Tennessee (United States)
  4. Nuclear Science Division, Lawrence Berkeley Laboratory, Berkeley, California (United States) Physics Department, University of California, Berkeley, California (United States)
  5. Nuclear Science Division, Lawrence Berke
+ Show Author Affiliations
We have continued our studies of the [beta]-spectrum of [sup 14]C using a germanium detector doped with [sup 14]C. There is a feature in the [beta]-spectrum 17 keV below the endpoint which could be explained by the hypothesis that there is a heavy neutrino emitted in the [beta]-decay of [sup 14]C with a mass of 17[plus minus]1 keV and an emission probability of 1.26[plus minus]0.25%. However, we also have performed a high statistics measurement of the inner bremsstrahlung spectrum of [sup 55]Fe and find no indication of the emission of a 17-keV neutrino. We conclude that the origin of the kink'' that has been observed in some recent beta spectral measurements is not a neutrino.
DOE Contract Number:
AC03-76SF00098; FG05-87ER40314
OSTI ID:
5540199
Report Number(s):
CONF-920837--
Conference Information:
Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 272:1
Country of Publication:
United States
Language:
English

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Related Subjects

662360 -- Decays of Baryons-- (1992-)
662430 -- Properties of Leptons-- (1992-)
663210* -- Ground-State Radioactivity-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA SPECTRA
BETA-MINUS DECAY RADIOISOTOPES
BREMSSTRAHLUNG
CALCULATION METHODS
CARBON 14
CARBON ISOTOPES
DECAY
DETECTION
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE DECAY
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
INTERMEDIATE MASS NUCLEI
IRON 55
IRON ISOTOPES
ISOTOPES
LEPTONS
LIGHT NUCLEI
MASS
MASSLESS PARTICLES
MONTE CARLO METHOD
NEUTRINO DETECTION
NEUTRINOS
NUCLEAR DECAY
NUCLEI
RADIATION DETECTION
RADIATIONS
RADIOISOTOPES
SPECTRA
YEARS LIVING RADIOISOTOPES