Long standing problem of 210Bi and the realistic neutron-proton effective interaction

Details Long standing problem of 210Bi and the realistic neutron-proton effective interaction Long standing problem of 210Bi and the realistic neutron-proton effective interaction

2007-11-28

arxiv.org/abs/0711.4455v2

Phys.Rev.C76:061303,2007

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 figures, 1 table, to be published on Physical Review C as a Rapid Communication

Scientific paper

10.1103/PhysRevC.76.061303

The odd-odd nucleus 210Bi is studied within the framework of the shell model using effective two-body matrix elements derived from the CD-Bonn nucleon-nucleon potential. The experimental energies of the proton-neutron multiplet ph9/2 ng9/2 are remarkably well reproduced by the theory, which accounts for the 1- state being the ground state instead of the 0- predicted by the Nordheim strong coupling rule. It is shown that the core-polarization effects are crucial to produce this inversion. The similarity between neutron-proton multiplets in the 132Sn and 208Pb regions is discussed in connection with the effective interaction.

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