Nuclear orientation study of the decay of 173Lu

Abstract

A decay study of 173Lu oriented at low temperatures in a gadolinium host is carried out. Directional distributions of 12 γ-rays in 173Yb are measured using the high-resolution Ge(Li) detectors. The E2 M1 and M2 E1 multipole mixing ratios of mixed γ-transitions are deduced. The energies and structure of the rotational band levels in 173Yb, reduced E2 and M1 transition probabilities and E2 M1 mixing ratios are calculated in the framework of the semi-microscopic quasiparticle-phonon model with a Coriolis interaction included. In general, good agreement is obtained between the experimental results and theory.