deformed and transitional rareearth nuclei are considered in Section 2.1. The regimes of collective and single-particle rotation Obtained by cranking Of the Nilsson and Woods-Saxon sin@epartick potentials are surveyed in Section 2.2. Here it is found Collective properties at low and high spin for nuclei with Z 2 64 and N 2 82 are calculated on the basis of deformed single-particle potentials. m e calculations are confronted with the available experimental data like low-lying octupole bands, rotational bands of transitional nuclei with N 2 90 and evidence for collectivity in high-spin single-particle spectra. In the latter collective triaxiality and collective rotation perpendicular to the aligned spin are investigated by cranking and RF'A. Predicted regimes of different shapes and shape transitions at high spins are presented. In a gamma cascade calculation, it is shown how the calculated regimes for '$*Dy are consistent with the measured inclusive spectrum.
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