β-Ray Spectrum of RaE

Abstract

It is shown that the famous beta ray spectrum of RaE can be explained in the Fermi theory in terms of the scalar plus tensor interaction for the selection rule, ΔJ=±1, yes. In this attempt, the simultaneous contribution to the electron wave function of the finite de Broglie wave length effect and the finite nuclear radius effect is reasonably taken into account for the first time. As far as the present calculation is concerned, the relative sign of the weight of the scalar and tensor interaction can not be determined.