Gross shell structure at high spin in heavy nuclei
M. A. Deleplanque, S. Frauendorf, V. V. Pashkevich, S. Y. Chu, A. Unzhakova
Abstract
Experimental nuclear moments of inertia at high spins along the yrast line have been determined systematically and found to differ from the rigid-body values. The difference is attributed to shell effects and these have been calculated microscopically. The data and quantal calculations are interpreted by means of the semiclassical Periodic Orbit Theory. From this new perspective, features in the moments of inertia as a function of neutron number and spin, as well as their relation to the shell energies can be understood. Gross shell effects persist up to the highest angular momenta observed.
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