E2 and M1 strengths in heavy deformed nuclei

Energy levels of the four lowest bands in Dy-160,Dy-162,Dy-164 and Er-168, B(E2) transition strengths between the levels, and the B(Ml) strength distr ibution of the ground state, all calculated within the framework of pseudo- SU3 model, are presented. Realistic single-particle energies and quadrupole -quadrupole and pairing interaction strengths fixed from systematics were u sed in the calculations. The strengths of four rotor-like terms, all small relative to the other terms in the interaction, were adjusted to give an ov erall best fit to the energy spectra. The procedure yielded consistent para meter sets for the four nuclei.