Multipole admixtures of electromagnetic transitions in the decay of160Tb

Abstract

The multipole mixing ratios of 11 electromagnetic transitions in the decay of160Dy following the ß- decay of160Tb are measured by the ?-?(?) directional correlation method. The observed mixing ratios show that the transitions de-exciting the ?-band are predominantly E2, and that the gamma-rays originating from the rotational levels are predominantly E1. The 879 keV transition may have an E0 and the 197 keV transition may have an M3 component. © 1991 Società Italiana di Fisica.