Measurement of the Mass of the Electron Neutrino Using Electron Capture in 163Ho
The mass of the electron neutrino has been recently investigated using electron capturing isotopes including 163Ho [1,2,3], 193pt  and so on. There are two ways to measure mνe; one proposed by A. De Rújula  of CERN which is essentially based on three body phase space in radiative electron capture process, and another that utilizes the mνe-dependence of. the electron capture rate, which was discussed by Bennett et al. . Considerations of the intensity of internal bremsstrahlung at electron capture in a 163Ho source, indicate that the first approach is very difficult [7,8]. Therefore, for the time being, we decided to pursue the second approach .
KeywordsElectron Capture Photon Spectrum Electron Neutrino Nuclear Matrix Element Electron Capture Rate
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