Comparison of Truncated Shell-model Calculations In the Laboratory and Intrinsic Systems

We perform, in the case of particles moving in a single-j level, shell model calculations in which the angular momentum of the individual pairs is restricted to a maximum value. The comparison with the full calculation shows the need for including at least the G pairs in the model space in order to reproduce the correct moments of inertia and transition rates of the different rotational bands. We also show that a level scheme very close to that obtained in the laboratory system can be alternatively obtained by angular momentum projection starting from intrinsic states evaluated in the intrinsic frame. © 1985 The American Physical Society.