Low energy spectra of A=159 and 161 nuclei

The pseudo SU(3) model is used to describe the low-energy spectra of Tb-159 , Dy-159, Eu-159, Tb-161 and Tm-161 and B(E2) electromagnetic transition st rengths in Tb-159. Th, building blocks of the model are the SU(3) proton an d neutron states having pseudo spin zero and 1/2, which describe even and o dd number of nucleons, respectively. The many-particle states are built as SU(3) coupled states with a well-defined particle number and total angular momentum. The Hamiltonian includes spherical NiIsson single-particle energi es, the quadrupole-quadrupole and pairing interactions, as well as two roto r terms which are diagonal in the SU(3) basis. As expected, the use of real istic single-particle energies plays a key role in an appropriate descripti on of these nuclei. The interactions are microscopic, and closely related t o those known to be the most relevant for the low-energy spectra.