ON THE FEASIBILITY OF DETERMINING ELECTRON-NEUTRINO MASS FROM THE STUDY OF ELECTRON CAPTURE RATES IN ¹⁵⁷Tb

A comparison between the electron captures of ¹⁵⁸Tb and ¹⁵⁷Tb is presented. The practical merit of using ¹⁵⁷Tb electron capture rates as a tool for electron-neutrino mass determination is analysed and emphasized.