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arXiv 0711.4455nucl-th
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210 Bi的长期问题和现实的中子-质子有效相互作用

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

L. Coraggio, A. Covello, A. Gargano, N. Itaco

摘要:

在壳模型框架下,利用由CD-Bonn核子-核子势导出的有效二体矩阵元,研究了奇-奇核210 Bi.该理论解释了质子-中子多重态ph 9/2ng 9/2的基态是1态,而不是Nordheim强耦合规则所预言的0态.结果表明,核心极化效应是至关重要的,产生这种反转。在132 Sn和208 Pb区域的中子-质子多重态之间的相似性进行了讨论与有效的相互作用。

英文摘要:

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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