Coherent and chaotic properties of nuclear pairing
arXiv:nucl-th/0109022 · doi:10.1103/PhysRevC.65.054312
Abstract
The properties of the pairing interaction in the shell model framework are considered with the aid of the exact numerical solution utilizing the quasispin symmetry. We emphasize the features which are out of reach for the usual approximate techniques based on the BCS approach supplemented by the random phase approximation treatment of pair vibrations, especially in the region of weak pairing where the BCS+RPA theory fails. For the first time chaotic aspects of the mixing generated by the pairing interaction are studied. The level repulsion and large information entropy of the eigenstates coexist with the absence of thermalization of single-particle motion. The full spectrum of pair vibration in average displays the spin dependence similar to that for a rigid rotor.
arXiv comment31 pages, 13 figures
References in corpus (6)
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- Neutron pair transfer in sub-barrier capture process
- Exploring quantum dynamics in an open many-body system: Transition to superradiance
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- Pairing Effect on Spectral Statistics of Even and Odd Mass Nuclei