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Self-consistent approach to deformation of intruder states in neutron-deficient Pb and Po

par Smirnova, N. A.;Heenen, Paul-Henri ;Neyens, G.
Référence Physics Letters B, 569, 3-4, page (151-158)
Publication Publié, 2003

Article révisé par les pairs

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Résumé :

We present systematic calculations of the properties of 11- isomers in neutron-deficient 184-198Pb and 188-200Po. These states are based on the π(h9/2i13/2)K π = 11- configuration. They are calculated in the framework of the Hartree-Fock-Bogoliubov method with a Skyrme interaction and density-dependent pairing force. The energies and deformations of the 11 - states are compared to those of the intruder 0+ states in both Pb and Po isotopes. In the most neutron-deficient Po isotopes, the calculations predict, below a weakly oblate 11- state, another oblate 11- state which is even more deformed than the intruder oblate 11- state in their Pb isotones. The energies and quadrupole moments of the 11- isomers, corresponding to a weakly oblate nuclear shape, are in fair agreement with the available experimental data. © 2003 Elsevier B.V. All rights reserved.