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Nuclear elasticity applied to giant resonances of fast rotating nuclei

Abstract : Isoscalar giant resonances in fast rotating nuclei are investigated within the framework of nuclear elasticity by solving the equation of motion of elastic nuclear medium in a rotating frame of reference. Both Coriolis and centrifugal forces are taken into account. The nuclear rotation removes completely the azimuthal degeneracy of the giant resonance energies. Realistic large values of the angular velocity, which are still small as compared to the giant resonance frequencies, are briefly reviewed in relation to allowed high angular momenta. It is shown that for the A=150 region, the Coriolis force is dominating for small values (≲0.05) of the ratio of angular velocity to resonance frequency, whereas the centrifugal force plays a prominent part in the shift of the split resonance energies for larger values of the ratio. Typical examples of the resonance energies and their fragmentation due to both rotation and deformation are given.
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S. Jang, A. Bouyssy. Nuclear elasticity applied to giant resonances of fast rotating nuclei. Physical Review C, American Physical Society, 1987, 36, pp.1587-1594. ⟨10.1103/PhysRevC.36.1587⟩. ⟨in2p3-00022702⟩

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