Possible Experiments for Determination of Beta Interactions. II

Abstract

In Part I of this series we have proposed some possible recoil experiments to decide the relative strength of scalar and vector interactions and that of tensor and axial vector interactions in beta decay. The formulas in the analysis of these experiments have been given for decays involving beta-gamma cascades and $K$-capture gamma-gamma cascades. Here, similar formulas are given for decays involving beta-gamma-gamma cascades, taking into account the nuclear resonance fluorescence and circular polarization of the gamma ray. The decay of ${\mathrm{Co}}^{60}$ is discussed in detail. The degree of the circular polarization of the resonant gamma ray from ${\mathrm{Ni}}^{60}$ is 2% left-handed if the beta interaction is axial vector and 23% right-handed if tensor.