  The pseudo-SU(3) model is used to describe the low-energy spectra as well as
$E2$ and $M1$ transition strengths in $^{158}$Gd. The Hamiltonian includes
spherical single-particle energies, the quadrupole-quadrupole and proton and
neutron pairing interactions, plus four rotor-like terms. The parameters of the
Hamiltonian were fixed by systematics with the rotor-like terms determined
through a least-squares analysis. The basis states are built as linear
combinations of SU(3) states which are the direct product of SU(3) proton and
neutron states with pseudo-spin zero. The calculated results compare favorably
with the available experimental data, which demonstrates the ability of the
model to describe such nuclei.
