Evidence for the emission of a massive neutrino in nuclear beta decay
E B Norman; B Sur; K T Lesko; M M Hindi; R -M Larimer; T R Ho; J T Witort; P N Luke; W L Hansen; E E Haller; E B Norman; Nucl. Sci. Div., Lawrence Berkeley Lab., CA, USA; B Sur; Nucl. Sci. Div., Lawrence Berkeley Lab., CA, USA; K T Lesko; Nucl. Sci. Div., Lawrence Berkeley Lab., CA, USA; M M Hindi; Nucl. Sci. Div., Lawrence Berkeley Lab., CA, USA; R -M Larimer; Nucl. Sci. Div., Lawrence Berkeley Lab., CA, USA; T R Ho; Nucl. Sci. Div., Lawrence Berkeley Lab., CA, USA; J T Witort; Nucl. Sci. Div., Lawrence Berkeley Lab., CA, USA; P N Luke; Nucl. Sci. Div., Lawrence Berkeley Lab., CA, USA; W L Hansen; Nucl. Sci. Div., Lawrence Berkeley Lab., CA, USA; E E Haller; Nucl. Sci. Div., Lawrence Berkeley Lab., CA, USA
Журнал:
Journal of Physics G: Nuclear and Particle Physics
Дата:
1991-12-01
Аннотация:
The authors have studied the beta -spectrum of <sup>14</sup>C using a germanium detector containing a crystal with <sup>14</sup>C dissolved in it. They find a feature in the beta -spectrum 17 keV below the endpoint which can be explained by the hypothesis that there is a heavy neutrino emitted in the beta -decay of <sup>14</sup>C with a mass of 17+or-2 keV and an emission probability of 1.40+or-0.45%. In addition, they have studied the inner bremsstrahlung spectrum of <sup>55</sup>Fe and also find indications of the emission of a approximately 17 keV neutrino.
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