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Configuration mixing og angular momentum projected self-consistent mean-field states for neutron-deficient Pb isotopes

par Bender, Michaël ;Bonche, Paul;Duguet, Thomas;Heenen, Paul-Henri
Référence Physical Review C (Nuclear Physics)
Publication Publié, 2004

Article révisé par les pairs

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Résumé :

We study the low-lying collective excitation spectra of the neutron-deficient lead isotopes 182-194Pb by performing a configuration mixing of angular momentum and particle-number projected self-consistent mean-field states. The same effective interaction is used to generate the mean-field states and for the configuration mixing. We choose the Skyrme interaction SLy6 supplemented by a density-dependent zero-range pairing force. Our study supports the interpretation of the excitation spectra made on the grounds of more schematic models in terms of coexisting spherical, oblate, prolate, and superdeformed prolate structures. The model qualitatively reproduces the variation of the spectra with neutron number. Our results for E0 and E2 transition probabilities are compared with the few existing experimental data. Finally, we predict the presence of super-deformed bands at low excitation energy in the most neutron-deficient isotopes.