ABSTRACT
From the time it was initially proposed, the neutrino has been thought to have a very small or zero mass. The end-point energy should be different for each mass and should be reduced by the mass of the neutrino. If the neutrino has a finite mass, then high-energy neutrinos will have a higher velocity than low-energy neutrinos, and will arrive at the earth before the low-energy neutrinos. The uncertainty of the evidential situation with respect to the existence of the 17-keV neutrino was emphasized in the work of Bonvicini. Support for the existence of the 17-keV neutrino began to erode in 1992. The 17-keV neutrino received another severe blow when Hime extended his calculation of the electron response function of his detector to include electron scattering effects that had not been previously included. The motivation for Bergkvist’s experiment was both the recent discovery of a muon neutrino, in addition to the usual electron neutrino.
