Perturbed γ-γ directional correlations and the complex chemistry of hafnium and tantalum

In the experiments described in this paper, the γ-γ directional correlation in the decay of 181Hf was measured in dilute aqueous solutions containing varying amounts of fluoride. The observed variations in the anisotropy are explained from complex formation and precipitation, possibly preceeded by polymerization. The results indicate that measurements of directional correlations may provide a useful tool for studies of complex formation in dilute solutions of suitable elements