CXL. Nuclear orientation of cerium 141

Abstract

Abstract 141Ce has been aligned by the method of magnetic hfs (alignment) in a crystal of cerium ethyl sulphate. From measurements of the angular distribution and the plane of polarization of the γ-radiation it is concluded that the γ-ray transition is principally M1 with a small admixture of E2 (δ=+0·08±0·02). Values of 0·75±0·20 and 0·66±0·16 nuclear magnetons are found for the nuclear moment of 141Ce, depending on whether the β-transition involves a spin change of 1 or 0.