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A massive neutrino in nuclear beta decay

Conference ·
OSTI ID:6832212
; ; ; ; ; ;  [1];  [2];  [3]
  1. Lawrence Berkeley Lab., CA (United States)
  2. Lawrence Berkeley Lab., CA (United States) University of Sao Paulo, Sao Paulo, Brazil (United States). Physics Institute
  3. Lawrence Berkeley Lab., CA (United States) Tennessee Technological Univ., Cookeville, TN (United Stat
+ Show Author Affiliations
We have continued our studies of the [beta]-spectrum of [sup 14]C using a germanium detector doped with [sup l4]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 [sup 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.
Research Organization:
Lawrence Berkeley Lab., CA (United States)
Sponsoring Organization:
DOE; USDOE, Washington, DC (United States)
DOE Contract Number:
AC03-76SF00098; FG05-87ER40314
OSTI ID:
6832212
Report Number(s):
LBL-32913; CONF-920682--3; ON: DE93004706
Country of Publication:
United States
Language:
English

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Related Subjects

440104 -- Radiation Instrumentation-- High Energy Physics Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
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-MINUS DECAY RADIOISOTOPES
BREMSSTRAHLUNG
CARBON 14
CARBON ISOTOPES
DECAY
DETECTION
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE DECAY
ELECTRON CAPTURE RADIOISOTOPES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
GE SEMICONDUCTOR DETECTORS
INTERMEDIATE MASS NUCLEI
IRON 55
IRON ISOTOPES
ISOTOPES
LIGHT NUCLEI
MASS
MEASURING INSTRUMENTS
NEUTRINO DETECTION
NUCLEAR DECAY
NUCLEI
RADIATION DETECTION
RADIATION DETECTORS
RADIATIONS
RADIOISOTOPES
REST MASS
SEMICONDUCTOR DETECTORS
YEARS LIVING RADIOISOTOPES