One- and two-nucleon transfer reactions to 196Au

To provide information for comparison with predictions from a dynamical supersymmetry, the odd-odd nucleus 196Au was studied via transfer reactions. With a polarized deuteron beam we measured (d-vector,t) and (d-vector,α), and with unpolarized beams we measured (p,d) (3He,d), and (α,d) transfer reactions. From the high-resolution 197Au(p,d)196Au spectrum, a rather complete set of excitation energies was obtained. Quantum numbers and spectroscopic factors were obtained from angular distributions of single-neutron transfer in 197Au(d-vector,t)196Au, single-proton transfer in 195Pt(3He,d)196Au, and two-nucleon transfer 198Hg(d-vector,α)196Au. We obtain firm Jπ assignments for 21 out of the 27 states with negative parity observed up to 490 keV excitation energy, by combining our data with that taken using γγ and conversion electron spectroscopy. The number of states and the firm or restricted assignments are in agreement with the predictions from the dynamical Uν(6/12)xUπ(6/4) supersymmetric scheme. Including our (α,d) data, we can deduce spectroscopic factors for four different transfer channels. When model predictions of spectroscopic factors become available, these data will provide a further critical test as to what extent this symmetry is realized in nature