Angular correlations of gamma rays in the decay of 109Pd and 111Pd

In this work, angular correlation techniques have been used to determine the mixing ratios of several γ-transitions in 109Ag and 111Ag and to make some spinparity assignments for some of the levels in these nuclei. The choice of these two isotopes for study in this work was made for three main reasons: (1) lack of existing information on the electromagnetic properties of these nuclei; (2) unexpectedly large M2E1 mixing ratios had been measured in Bosch et al. and required verification and; (3) the possibility of testing a particle-rotor model, due to De-Shalit, whereby 109Ag and 111Ag can be described as a single p12 proton coupled to a deformed, even-even core. Zeghib et al. have had considerable success in applying this model to 111Ag recently. More data is needed on level structure and mixing ratios to test fully the validity of this model. In the following, a brief description of the theory of angular correlations is given. Then a detailed description of the automatic data acquisition system for the spectrometer is given. This system was designed specifically to meet the needs of this experiment. Finally, the results of the studies of the two isotopes of interest are detailed. 16 refs., 19 figs., 9 tabs