Abstract
Starting from the cranking model and applying the Hartree-Fock-Bogolubov theory with approximate projection of the particle number, one may give a satisfactory description of many properties of the rotational bands in nuclei. Calculations within the framework of this model show that the anomalies at high-spin states are caused by two effects: the Coriolis antipairing which reduces the energy gap with increasing angular momentum, on the one hand, and the alignment of the neutrons of positive parity along the axis of rotation, on the other hand. Moreover, the results show that the speed with which the alignment occurs has an important effect on the appearance of anomalies at high angular momenta.
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