Magnetic moments of K isomers as indicators of octupole collectivity

Abstract

The relation between the quadrupole-octupole deformation and the structure of high-K isomers in heavy even-even nuclei is studied through a reflection asymmetric deformed shell model including a BCS procedure with constant pairing interaction. Two-quasiparticle states with K = 4 , 5 , 6 , 6 and 7 are considered in the region of actinide nuclei (U, Pu and Cm) and rare-earth nuclei (Nd, Sm and Gd). The behaviour of two-quasiparticle energies and magnetic dipole moments of these configurations is examined over a wide range in the plane of quadrupole and octupole deformations (β and β . In all considered actinide nuclei, the calculations show that there is pronounced sensitivity of the magnetic moments to the octupole deformation. In the rare-earth nuclei, the calculations for Gd show stronger sensitivity of the magnetic moment to the octupole deformation than in the other considered cases. © 2012 SIF, Springer-Verlag Berlin Heidelberg.

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